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CRISPR/Cas9-mediated dual editing of VviGAI and VviFLC generates a novel early-flowering grapevine germplasm. CRISPR/ cas9介导的VviGAI和VviFLC双编辑产生了一种新的早花葡萄种质。
IF 3.8 3区 生物学
Planta Pub Date : 2026-02-21 DOI: 10.1007/s00425-026-04936-w
Zhuoshuai Jin, Min Liu, Meng Liu, Xinyu Qi, Liang Zhao, Xuena Yu, Ye Guo, Yingqiang Wen
{"title":"CRISPR/Cas9-mediated dual editing of VviGAI and VviFLC generates a novel early-flowering grapevine germplasm.","authors":"Zhuoshuai Jin, Min Liu, Meng Liu, Xinyu Qi, Liang Zhao, Xuena Yu, Ye Guo, Yingqiang Wen","doi":"10.1007/s00425-026-04936-w","DOIUrl":"10.1007/s00425-026-04936-w","url":null,"abstract":"<p><strong>Main conclusion: </strong>CRISPR/Cas9-mediated dual knockout of VviGAI1 and VviFLC in grapevine promotes early flowering and induces distinctive morphological changes, offering novel genetic resources for breeding. CRISPR/Cas9-mediated genome editing offers a transformative approach for grapevine improvement. In this study, we achieved simultaneous knockout of two central flowering regulators VviGAI1, a DELLA protein ortholog, and VviFLC, a floral repressor in Vitis vinifera 'Cabernet Sauvignon' using a dual-sgRNA vector system. Remarkably, all 15 independent edited lines exhibited biallelic mutations in both genes, primarily consisting of frameshifts that led to premature termination. The dual-mutant plants displayed a range of distinctive phenotypic alterations, including dwarfism, shortened internodes, modified leaf morphology, and disrupted tendril development. Notably, one line (EL-43) showed precocious flowering under greenhouse conditions, underscoring the synergistic role of VviGAI1 and VviFLC in repressing floral transition. Comparative analysis with previously reported gai mutants revealed both conserved and novel traits, suggesting that structural variation within the DELLA domain contributes to phenotypic diversity. Collectively, our findings establish that dual editing of VviGAI1 and VviFLC not only accelerates flowering but also introduces unique vegetative and reproductive characteristics, providing a valuable genetic resource for future grapevine domestication and precision breeding efforts.</p>","PeriodicalId":20177,"journal":{"name":"Planta","volume":"263 3","pages":""},"PeriodicalIF":3.8,"publicationDate":"2026-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146258732","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Correction: The potential of Pseudomonas spp. as sustainable bioinoculants for enhancing maize growth and integrated management of drought and Fusarium verticillioides stress. 更正:假单胞菌作为促进玉米生长和干旱和黄萎病胁迫综合管理的可持续生物接种剂的潜力。
IF 3.8 3区 生物学
Planta Pub Date : 2026-02-21 DOI: 10.1007/s00425-026-04943-x
Khethiwe Ndlazi, Siyabonga Ntshalintshali, Lungelo Buthelezi, Ashwil Klein, Marshall Keyster, Mbukeni Nkomo, Arun Gokul
{"title":"Correction: The potential of Pseudomonas spp. as sustainable bioinoculants for enhancing maize growth and integrated management of drought and Fusarium verticillioides stress.","authors":"Khethiwe Ndlazi, Siyabonga Ntshalintshali, Lungelo Buthelezi, Ashwil Klein, Marshall Keyster, Mbukeni Nkomo, Arun Gokul","doi":"10.1007/s00425-026-04943-x","DOIUrl":"10.1007/s00425-026-04943-x","url":null,"abstract":"","PeriodicalId":20177,"journal":{"name":"Planta","volume":"263 3","pages":""},"PeriodicalIF":3.8,"publicationDate":"2026-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12924821/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146258751","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Microfibril orientation and compositional heterogeneity in fiber and vessel cell walls of poplar xylem studied by AFM-IR and SFG spectroscopy. 利用AFM-IR和SFG光谱研究了杨树木质部纤维和导管细胞壁的微纤维取向和成分异质性。
IF 3.8 3区 生物学
Planta Pub Date : 2026-02-19 DOI: 10.1007/s00425-026-04947-7
Jongcheol Lee, Juseok Choi, Yen-Ting Lin, Fangxin Qian, Botong Tong, Quanzi Li, Seong H Kim
{"title":"Microfibril orientation and compositional heterogeneity in fiber and vessel cell walls of poplar xylem studied by AFM-IR and SFG spectroscopy.","authors":"Jongcheol Lee, Juseok Choi, Yen-Ting Lin, Fangxin Qian, Botong Tong, Quanzi Li, Seong H Kim","doi":"10.1007/s00425-026-04947-7","DOIUrl":"10.1007/s00425-026-04947-7","url":null,"abstract":"<p><strong>Main conclusion: </strong>This study demonstrates the use of photothermal AFM-IR and vibrational SFG microscopy to investigate nanoscale chemical heterogeneity and mesoscale cellulose microfibril orientation in hybrid poplar xylem, revealing differences in cellulose microfibril (CMF) orientation between fiber and vessel cell walls that are consistent with their mechanical support and hydraulic functions. Understanding the structural organization of cellulose microfibrils (CMFs) within individual plant cell walls is essential for connecting cell wall architecture to its mechanical and physiological functions. However, due to the complex hierarchical structure and nanoscale heterogeneity of cell walls, it remains technically challenging to resolve detailed compositional and orientational information at subcellular levels of individual cell walls. This study investigates the internal 3D structure, chemical composition, and sublayer organization of fiber and vessel cell walls in the xylem tissue of a two-year-old field-grown hybrid poplar tree (Populus alba × P. glandulosa) using photothermal atomic force microscopy coupled with infrared spectroscopy (AFM-IR) and sum frequency generation (SFG) hyperspectral microscopy. AFM-IR provided nanoscale chemical imaging, revealing localized compositional heterogeneity, including variations between adjacent cell walls and transitional layers beyond the traditional S1, S2, and S3 sublayers. SFG microscopy revealed that CMFs in fiber walls are highly aligned along the stem axis, consistent with their role in mechanical support, while vessel cell walls exhibited slightly tilted CMFs, reflecting their function in hydraulic transport. Together, these results offer new insights into cell-type-specific CMF organization and compositional gradients in hybrid poplar xylem. These findings highlight the structural and chemical complexity of secondary cell walls in woody plants and demonstrate the value of AFM-IR and SFG spectroscopy in elucidating plant cell wall architecture.</p>","PeriodicalId":20177,"journal":{"name":"Planta","volume":"263 3","pages":"77"},"PeriodicalIF":3.8,"publicationDate":"2026-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12920761/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146228335","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Root microorganisms enhance crop resistance to low-temperature stress by increasing antioxidant enzyme activity. 根系微生物通过提高抗氧化酶活性来增强作物对低温胁迫的抗性。
IF 3.8 3区 生物学
Planta Pub Date : 2026-02-16 DOI: 10.1007/s00425-026-04946-8
Han Zhang, Junhui Li, Gang Chen, Youguo Zhan, Dekai Ning, Jiaqi Liu, Ruiwen Hu, Ge Tan, Qiyun Zhou, Juan Li, Zhengling Liu
{"title":"Root microorganisms enhance crop resistance to low-temperature stress by increasing antioxidant enzyme activity.","authors":"Han Zhang, Junhui Li, Gang Chen, Youguo Zhan, Dekai Ning, Jiaqi Liu, Ruiwen Hu, Ge Tan, Qiyun Zhou, Juan Li, Zhengling Liu","doi":"10.1007/s00425-026-04946-8","DOIUrl":"10.1007/s00425-026-04946-8","url":null,"abstract":"<p><strong>Main conclusion: </strong>At low temperatures, alterations in root-associated microorganisms enhance the antioxidant enzyme activity in plants, thereby increasing their stress resistance. Low-temperature stress is an important environmental factor that restricts plant growth and development. While microbial inoculants play a significant role in alleviating plant low-temperature stress, the specific mechanisms involved remain unclear. This study evaluated the effects of exogenously applied microbial inoculants (composed of Clostridium sensu stricto, Altererythrobacte, Gemmatimona, Stenotrophomona, and Leclerici) on tobacco seedling growth, antioxidant enzyme activity, and root surface microbial communities under low-temperature stress, as well as the interrelationships among these factors. Under low-temperature stress, plants were treated with increasing volumes of functional microbial agents at three levels (T1, T2, T3), compared to a control (CK) without inoculation. The results indicated that the application of microbial inoculants significantly promoted the growth of tobacco seedlings. Root growth and dry matter accumulation of tobacco seedlings were positively correlated with the amount of microbial inoculum applied. Furthermore, microbial inoculants significantly enhanced the activities of antioxidant enzymes (POD, CAT, and SOD) in tobacco seedlings. The T3 treatment increased these activities by 191.1%, 234.68%, and 268.37%, respectively. Network analysis and correlation analysis identified key bacterial genera associated with the cold resistance of tobacco seedlings, namely, Arthrobacter, Asticcacaulis, Rhodobacter, and Chitinophaga, which showed a significant positive correlation with the growth of tobacco seedlings. The increase in these microbial populations significantly enhanced the dry matter accumulation and the relative abundance of antioxidant capacity in tobacco seedlings, indicating that the changes in the structure and function of these plant-associated communities are one of the important reasons for the improved stress resistance of flue-cured tobacco seedlings under low-temperature stress. Partial least squares path modeling (PLS-PM) analysis revealed that the key microbial genera significantly influenced the growth of tobacco seedlings by affecting the activity of antioxidant enzymes. The results above indicate that exogenous microbial agents alleviate low-temperature stress by altering the composition of microbial communities and affecting the activity of plant antioxidant enzymes. This study provides new research perspectives for sustainable agricultural development and mitigating crop low-temperature stress.</p>","PeriodicalId":20177,"journal":{"name":"Planta","volume":"263 3","pages":"76"},"PeriodicalIF":3.8,"publicationDate":"2026-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146202099","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Genome-wide association mapping of rice bran oil content and γ-oryzanol reveals candidate genes for lipid biosynthesis and transport. 米糠含油量与γ-谷维醇的全基因组关联图谱揭示了脂质生物合成和转运的候选基因。
IF 3.8 3区 生物学
Planta Pub Date : 2026-02-12 DOI: 10.1007/s00425-026-04922-2
Samrath Baghel, Parmeshwar Kumar Sahu, Ravi Raj Singh Patel, Poonam Gajanan Bhad, Sayaji Mehetre, Bikram Kishore Das, Girish Chandel, Latif Ahmad Peer, Deepak Sharma, Suvendu Mondal
{"title":"Genome-wide association mapping of rice bran oil content and γ-oryzanol reveals candidate genes for lipid biosynthesis and transport.","authors":"Samrath Baghel, Parmeshwar Kumar Sahu, Ravi Raj Singh Patel, Poonam Gajanan Bhad, Sayaji Mehetre, Bikram Kishore Das, Girish Chandel, Latif Ahmad Peer, Deepak Sharma, Suvendu Mondal","doi":"10.1007/s00425-026-04922-2","DOIUrl":"10.1007/s00425-026-04922-2","url":null,"abstract":"<p><strong>Main conclusion: </strong>This study deciphers the genetic architecture of rice bran nutraceuticals, providing elite germplasm, molecular markers, and candidate genes for breeding biofortified, heart-healthy rice varieties. Rice bran oil is uniquely rich in nutraceuticals, such as γ-oryzanol and tocols, which confer anti-inflammatory, antidiabetic, and cardioprotective properties. Despite their nutritional and economic value, the genetic basis of variation in these traits in rice remains poorly understood. We investigated 192 diverse rice genotypes from the globally significant Chhattisgarh germplasm collection. Using multi-year biochemical profiling, we quantified the natural variation in bran oil content, γ-oryzanol, and total tocols. Genome-Wide Association Studies used both the GLM and BLINK models for statistical robustness with 1K-Rice Custom Amplicon (1K-RiCA) SNP genotyping data. We observed wide genetic variation, with oil content reaching 21.8%, γ-oryzanol exceeding 14,000 ppm, and tocols reaching up to 170 ppm. Genome-wide association studies identified three consistent SNP-trait associations: two (chr01_28142020 and chr10_19217152) with oil content across all seasons and one (chr12_8070782) with γ-oryzanol in two seasons. Candidate gene mining within ± 1 Mb revealed lipid metabolism and transport genes, including OsLACS4, multiple OsLTP2 family members, and a CXE carboxylesterase that is putatively involved in γ-oryzanol turnover. These genes showed seed-, panicle-, and embryo-specific expression, supporting their roles in oil biosynthesis and storage. This study uncovers the genomic regions and candidate genes underlying nutritionally important compounds in rice bran oil and highlights the underutilized value of Chhattisgarh rice germplasm. By linking specific SNPs to metabolic functions, we provide molecular targets for marker-assisted selection and biofortification strategies aimed at developing rice varieties enriched with health-promoting oil components. These findings establish a foundation for breeding \"heart-healthy rice\" and contribute to edible oil self-sufficiency.</p>","PeriodicalId":20177,"journal":{"name":"Planta","volume":"263 3","pages":"75"},"PeriodicalIF":3.8,"publicationDate":"2026-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146166423","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A glycosyltransferase, UGT84J2, regulates the level of anthocyanin in tea plants. 糖基转移酶UGT84J2调节茶树花青素的水平。
IF 3.8 3区 生物学
Planta Pub Date : 2026-02-11 DOI: 10.1007/s00425-026-04944-w
Yiwen Chen, Salome Njeri Ndombi, Yu Duan, Jie Jiang, Qiang Shen, Juan Yin, Yuanchun Ma, Wanping Fang, Xujun Zhu
{"title":"A glycosyltransferase, UGT84J2, regulates the level of anthocyanin in tea plants.","authors":"Yiwen Chen, Salome Njeri Ndombi, Yu Duan, Jie Jiang, Qiang Shen, Juan Yin, Yuanchun Ma, Wanping Fang, Xujun Zhu","doi":"10.1007/s00425-026-04944-w","DOIUrl":"10.1007/s00425-026-04944-w","url":null,"abstract":"<p><strong>Main conclusion: </strong>Glycosyltransferase CsUGT84J2 can glycosylate p-coumaric acid and inhibit the expression of flavonol synthase under drought condition, which can both regulate anthocyanin synthesis in tea plants. Anthocyanins are the main substances in plants that produce rich colors, and they have received attention owing to their antioxidative functions. In this study, we identified a tea plant (Camellia sinensis) glycosyltransferase gene, CsUGT84J2, that regulates anthocyanin accumulation through a dual mechanism. p-Coumaric acid, a precursor of anthocyanin, can be glycosylated by CsUGT84J2. Furthermore, CsUGT84J2 overexpression significantly inhibited the flavonol synthase expression level, whereas dihydroflavonol 4-reductase dominated the substrate competition, which is the major step in the anthocyanin synthesis pathway. Drought tolerance was not enhanced in the CsUGT84J2-overexpressing plants. Even though anthocyanins accumulated in large amounts, the photosynthetic and oxidation systems were more seriously damaged in the CsUGT84J2-overexpressing plants than in the wild-type. Anthocyanins have a role in active oxygen scavenging, and the superoxide dismutase activity was lower than that in wild-type, even at a higher oxidative damage level. This study identified a close relationship between CsUGT84J2 and anthocyanin synthesis, which helps increase our understanding of the anthocyanin anabolic regulatory network.</p>","PeriodicalId":20177,"journal":{"name":"Planta","volume":"263 3","pages":"74"},"PeriodicalIF":3.8,"publicationDate":"2026-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146158036","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Unraveling functions of a novel miRNA-aquaporin module linked to rice domestication. 揭示与水稻驯化相关的新型mirna -水通道蛋白模块的功能。
IF 3.8 3区 生物学
Planta Pub Date : 2026-02-11 DOI: 10.1007/s00425-026-04932-0
T N Sujith, A Archana, N Anushree, P V Shivaprasad
{"title":"Unraveling functions of a novel miRNA-aquaporin module linked to rice domestication.","authors":"T N Sujith, A Archana, N Anushree, P V Shivaprasad","doi":"10.1007/s00425-026-04932-0","DOIUrl":"10.1007/s00425-026-04932-0","url":null,"abstract":"<p><strong>Main conclusion: </strong>The indica rice originated and still grows in semi-aquatic conditions. It is not known how rice managed to adapt to field conditions during domestication. We show that a miRNA-aquaporin module is involved in such a transition. Most of the cultivated rice originated from ancestors that were semi-aquatic plants, having semi-prostrate stems bearing negligible seeds. It is not known how domesticated rice achieved delicate water relations during the transition to irrigated and gradually terrestrial ecosystem. Here, we show the involvement of an aquaporin that is differentially expressed between cultivated and wild rice, contributing to yield-related traits. Small (s)RNA-sequencing and degradome analysis identified specific targeting of this aquaporin by differentially expressing a well-conserved micro(mi)RNA named miR169. Although miR169 was previously implicated in stress tolerance, its targeting of aquaporin or the consequences of such a targeting were unknown. Using whole-genome approaches, such as sRNA-sequencing, RNA-seq, CRISPR-knockout lines, and stress assays, we show the involvement of this regulatory module in water-stress-associated traits. In agreement with its importance in domestication and yield-related traits, a known QTL for stress tolerance overlapped with this aquaporin. These results indicate yet another involvement of sRNA-mediated module in crop domestication.</p>","PeriodicalId":20177,"journal":{"name":"Planta","volume":"263 3","pages":"73"},"PeriodicalIF":3.8,"publicationDate":"2026-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146158100","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Advances in CRISPR/Cas systems for engineering abiotic stress tolerance in plants: mechanisms and future prospects. CRISPR/Cas系统在植物非生物抗逆性工程中的应用进展:机制与展望
IF 3.8 3区 生物学
Planta Pub Date : 2026-02-10 DOI: 10.1007/s00425-026-04942-y
Muhammad Farooq, Asma Khan, Amjad Hassan, Mohammad Maroof Shah
{"title":"Advances in CRISPR/Cas systems for engineering abiotic stress tolerance in plants: mechanisms and future prospects.","authors":"Muhammad Farooq, Asma Khan, Amjad Hassan, Mohammad Maroof Shah","doi":"10.1007/s00425-026-04942-y","DOIUrl":"10.1007/s00425-026-04942-y","url":null,"abstract":"<p><p>Abiotic stress factors such as drought, salinity, extreme temperatures, and oxidative stress significantly limit crop productivity and threaten global food security. Traditional breeding and transgenic approaches have been employed to enhance stress tolerance, but they are often time-consuming and face regulatory hurdles. The advent of CRISPR/Cas genome editing technology has revolutionized plant genetic engineering by enabling precise modifications to stress-responsive genes. This review explores recent advancements in CRISPR/Cas-based genome editing for improving abiotic stress resilience in crops. We discuss the mechanisms of CRISPR/Cas systems, their applications in stress tolerance, and emerging approaches such as multiplex genome editing, base editing, and AI-assisted CRISPR. Furthermore, we highlight challenges, ethical considerations, and future directions for integrating CRISPR into agricultural biotechnology. This review underscores the potential of CRISPR-based strategies in developing climate-resilient crops to ensure sustainable food production in the face of global climate change.</p>","PeriodicalId":20177,"journal":{"name":"Planta","volume":"263 3","pages":"72"},"PeriodicalIF":3.8,"publicationDate":"2026-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146150342","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Overexpression of Chlorella ellipsoidea DGAT1 gene in soybean improves oil content and influences lipid metabolism. 过表达椭圆小球藻DGAT1基因可提高大豆油脂含量,影响脂肪代谢。
IF 3.8 3区 生物学
Planta Pub Date : 2026-02-09 DOI: 10.1007/s00425-026-04929-9
Hao Li, Yueping Cao
{"title":"Overexpression of Chlorella ellipsoidea DGAT1 gene in soybean improves oil content and influences lipid metabolism.","authors":"Hao Li, Yueping Cao","doi":"10.1007/s00425-026-04929-9","DOIUrl":"10.1007/s00425-026-04929-9","url":null,"abstract":"<p><strong>Main conclusion: </strong>Overexpression of Chlorella ellipsoidea DGAT1 in soybean increases oil content and changes the components of fatty acids in seeds, resulting a great influence on lipid metabolism. High oil transgenic soybean germplasm is important for expanding soybean breeding resources. Here, CeDGAT1, a gene from Chlorella ellipsoidea encoded a key rate-limiting enzyme in triacylglycerol synthesis, was introduced into soybeans by Agrobacterium-mediated soybean cotyledon node method, and we have obtained an overexpression line CeDGAT1-OE#7 based on soybean cultivar Dengke12. Firstly, qRT-PCR analyses displayed that CeDGAT1 was expressed in all the tissues of the transgenic line CeDGAT1-OE#7. And the total oil content was significantly higher by an average of 2.27% in seeds compared with the wild type. The analyses for the components of fatty acids showed that palmitic acid (16:0), stearic acids (18:0), and oleic acid (18:1) increased significantly by an average percentage of 1.34%, 0.62%, and 5.91%, respectively, while the contents of linoleic acid (18:2) and linolenic acids (18:3) were significantly lower than that of the WT. Furthermore, metabolomics analyses were conducted by using developing seeds of three stages, and a total of 1467, 1461, and 1078 significantly differentially expressed metabolites (DEMs) were separately identified. Two lipid-related pathways, linoleic acid metabolism and alpha-linolenic acid metabolism, were identified using KEGG pathway analysis of these DEMs, and seven metabolites in the linoleic acid metabolism pathway were down-regulated simultaneously, suggesting that these metabolites might be crucial in the response for overexpression of CeDGAT1. Together, our study has developed a high-oil transgenic soybean germplasm as a future breeding resource and those findings obtained from this research have broadened our understanding of the molecular mechanism underlying oil accumulation and fatty acid metabolism.</p>","PeriodicalId":20177,"journal":{"name":"Planta","volume":"263 3","pages":"71"},"PeriodicalIF":3.8,"publicationDate":"2026-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146143151","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Conservation of giant genome structure in Brazilian and Chilean species of the genus Alstroemeria L. (Alstroemeriaceae), despite dynamism in satellite repeats. 巴西和智利Alstroemeria L.属(Alstroemeriaceae)物种的巨大基因组结构的保存,尽管卫星重复序列具有活力。
IF 3.8 3区 生物学
Planta Pub Date : 2026-02-06 DOI: 10.1007/s00425-026-04933-z
Jéssica Nascimento, Mariela Sader, Oscar Toro-Núñez, Carlos Baeza, Yennifer Mata-Sucre, Leonardo Félix, Andrea Pedrosa-Harand
{"title":"Conservation of giant genome structure in Brazilian and Chilean species of the genus Alstroemeria L. (Alstroemeriaceae), despite dynamism in satellite repeats.","authors":"Jéssica Nascimento, Mariela Sader, Oscar Toro-Núñez, Carlos Baeza, Yennifer Mata-Sucre, Leonardo Félix, Andrea Pedrosa-Harand","doi":"10.1007/s00425-026-04933-z","DOIUrl":"10.1007/s00425-026-04933-z","url":null,"abstract":"<p><strong>Main conclusions: </strong>Giant genomes in Alstroemeria have maintained structural conservation for ~18.4 million years, whereas satellite DNA amplification and elimination constitutes the main dynamic force underlying heterochromatin diversification and longitudinal chromosomal differentiation. Repetitive sequences are major components of plant genomes and play key roles in genome size evolution and structural variation. Alstroemeria L. is a genus of monocotyledonous plants with giant genomes (1C ≈ 25 Gb), native to the Americas and distributed into two distinct lineages: the Brazilian/Argentinean clade and the Chilean grade. Despite their ancient separation and differences in heterochromatin distribution, all species share a highly conserved chromosome number (2n = 16), with only minor variation in chromosome morphology. Here, we characterized the repetitive DNA fraction of six Chilean species, one Argentinean species, and two Brazilian species, and mapped the most abundant repeats on representative chromosomes from each lineage. LTR Ty3/gypsy Tekay retrotransposons were the predominant repetitive elements, accounting for 30.63-39.91% of the genome across all analyzed species and largely explaining genome size variation. Notably, despite their giant size, Alstroemeria genomes exhibited a relatively low overall proportion of repetitive DNA (up to ~68%), consistent with slow repeat removal and the accumulation of degraded sequences, as predicted for genomes of this size. Satellite DNA represented 0.23-3.42% of the genome, with most satellite families shared between the Brazilian and Chilean species. Nevertheless, despite the divergence of the Brazilian lineage approximately 9.2 million years ago, marked differences in satellite abundance and chromosomal distribution were observed. Our results indicate that giant genome evolution in Alstroemeria is characterized by long-term conservation of karyotype structure and transposable element composition, whereas satellite DNA constitutes a key dynamic component associated with heterochromatin diversification and longitudinal chromosomal differentiation between the Chilean and Brazilian lineages.</p>","PeriodicalId":20177,"journal":{"name":"Planta","volume":"263 3","pages":"69"},"PeriodicalIF":3.8,"publicationDate":"2026-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12876544/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146126072","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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