Journal of plant physiology最新文献_第2页

MdCNGC15B, a cyclic nucleotide-gated channel (CNGC) protein, positively regulates the tolerance to drought and salt stress in apple 环核苷酸门控通道（CNGC）蛋白MdCNGC15B正调控苹果对干旱和盐胁迫的耐性。

IF 4.1 3区生物学

Journal of plant physiology Pub Date : 2026-03-01 Epub Date: 2026-02-05 DOI: 10.1016/j.jplph.2026.154722

Xin-Long Guo , Hong-Liang Li , Xiang Wu , Tian-tian Wang , Yan-yan Guo , Jian-Ping An , Chun-Xiang You

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A calmodulin-like protein from Kentucky bluegrass PpCML29 confers drought tolerance through activating antioxidant defense to maintain ROS homeostasis 来自肯塔基蓝草的钙调素样蛋白PpCML29通过激活抗氧化防御来维持ROS稳态，从而赋予耐旱性

IF 4.1 3区生物学

Journal of plant physiology Pub Date : 2026-03-01 Epub Date: 2026-01-14 DOI: 10.1016/j.jplph.2026.154708

Yihan Su , Yuhui Li , Weicong Luo , Ying Liu , Zhenfei Guo , Shaoyun Lu

{"title":"A calmodulin-like protein from Kentucky bluegrass PpCML29 confers drought tolerance through activating antioxidant defense to maintain ROS homeostasis","authors":"Yihan Su , Yuhui Li , Weicong Luo , Ying Liu , Zhenfei Guo , Shaoyun Lu","doi":"10.1016/j.jplph.2026.154708","DOIUrl":"10.1016/j.jplph.2026.154708","url":null,"abstract":"<div><div>Calmodulin-like proteins (CMLs) are one of the Ca<sup>2+</sup> sensors involving plant growth, development and adaptation to environmental stresses. The role of PpCML29 from a native Kentucky bluegrass (<em>Poa pratensis</em> L.) in regulating drought tolerance was investigated in the present study. PpCML29 is most similar to OsCML29 among all CML members in rice. PpCML29 protein locates in the cytoplasm and the nucleus. <em>PpCML29</em> was expressed in roots, stems, leaves and spikes, with the highest level in leaves. <em>PpCML29</em> expression was induced by 6–24 h of treatment with 23 % polyethylene glycol (PEG)-6000. Overexpression of <em>PpCML29</em> led to increased drought tolerance, with higher levels of survival rate and relative water content (RWC) and lower levels of ion leakage in transgenic rice than in the wild type (WT) after drought and osmotic stress. In addition, lower water loss rate was observed in <em>PpCML29</em>-overexpressing lines compared with WT. Superoxide dismutase (SOD), catalase (CAT), and ascorbate peroxidase (APX) activities and proline concentrations increased after osmotic stress, and higher levels were observed in <em>PpCML29</em>-overexpressing lines than in WT. Consistently, relative expressions of <em>SOD1</em>, <em>SOD2</em>, <em>CAT1</em>, <em>CAT2</em>, <em>APX1</em>, <em>APX2</em>, <em>P5CS1</em> and <em>P5CS2</em> as well as drought responsive marker genes including <em>OsDREB1A</em>, <em>OsDREB2A</em>, <em>OsDREB2B</em>, <em>OsNCED3</em>, <em>OsLEA3</em> and <em>OsRAB16A</em> were induced by osmotic stress, with higher levels in <em>PpCML29</em>-overexpressing lines than in WT under osmotic stress. The results suggest that PpCML29 confers drought tolerance through upregulating drought responsive genes and activating proline biosynthesis and antioxidant defense system to maintain reactive oxygen species (ROS) homeostasis.</div></div>","PeriodicalId":16808,"journal":{"name":"Journal of plant physiology","volume":"318 ","pages":"Article 154708"},"PeriodicalIF":4.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146001673","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}

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Increasing CO2 concentration promoted the biomass accumulation but decreased the mineral nutrition and forage quality of Leymus chinensis CO2浓度的增加促进了羊草生物量的积累，但降低了羊草的矿质营养和饲料品质。

IF 4.1 3区生物学

Journal of plant physiology Pub Date : 2026-02-01 Epub Date: 2025-12-19 DOI: 10.1016/j.jplph.2025.154680

Jie Yu , Cheng Ji , Yongwei Sun , Zhi Qi

{"title":"Increasing CO2 concentration promoted the biomass accumulation but decreased the mineral nutrition and forage quality of Leymus chinensis","authors":"Jie Yu , Cheng Ji , Yongwei Sun , Zhi Qi","doi":"10.1016/j.jplph.2025.154680","DOIUrl":"10.1016/j.jplph.2025.154680","url":null,"abstract":"<div><div>The global atmospheric CO<sub>2</sub> concentration is predicted to increase from the current approximate 450 to 700 ppm by end of this century. To evaluate its potential impact on sustainability of grassland, <em>Leymus chinensis</em>, the dominant wild forage species in the eastern Eurasian Steppe, was cultivated in two growth chambers for a month with ambient 450 ppm (aCO<sub>2</sub>) as the control and elevated 700 ppm CO<sub>2</sub> (eCO<sub>2</sub>) as simulation of the future respectively. The eCO<sub>2</sub> increased the aboveground biomass, net photosynthesis rate and contents of carbohydrates, as well as the Mn contents in the leaves. The eCO<sub>2</sub> decreased the stomatal conductance, transpiration rate and the contents of mineral elements S, P, K, Fe, Zn in the xylem sap and leaves, as well as expression of ion transporter-encoding transcripts. As response to the eCO<sub>2</sub>, the DNA, RNA and protein metabolism related transcripts were over-represented in the down-regulation transcriptome, accompanied with reduction in the contents of amino acids. The eCO<sub>2</sub> significantly suppressed expression of lipid metabolism-encoding transcripts and contents of phospholipids, as well as expression of vesicle-traffic encoding transcripts. The eCO<sub>2</sub> decreased contents of bioactive compounds flavonoids, terpenoids including gibberellins and steroids. These data imply that the predicted increasing atmospheric CO<sub>2</sub> concentration in the near future would have negative impacts on the forage quality of the grass.</div></div>","PeriodicalId":16808,"journal":{"name":"Journal of plant physiology","volume":"317 ","pages":"Article 154680"},"PeriodicalIF":4.1,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145834135","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

The adaptation strategy of Astragalus mongholicus shoots to the root Fe2+ deficiency and its strong stimulating effect on glucoliquiritin apioside accumulation 黄芪茎部对根系Fe2+缺乏的适应策略及其对糖醛酸苷苷积累的强烈刺激作用

IF 4.1 3区生物学

Journal of plant physiology Pub Date : 2026-02-01 Epub Date: 2025-12-19 DOI: 10.1016/j.jplph.2025.154679

Yanbing Dong , Yang Nan , Zhi Qi

{"title":"The adaptation strategy of Astragalus mongholicus shoots to the root Fe2+ deficiency and its strong stimulating effect on glucoliquiritin apioside accumulation","authors":"Yanbing Dong , Yang Nan , Zhi Qi","doi":"10.1016/j.jplph.2025.154679","DOIUrl":"10.1016/j.jplph.2025.154679","url":null,"abstract":"<div><div>Iron is an essential micronutrient. However, nearly 40 % of arable land worldwide suffers from iron deficiency. In this study, the adaptation of shoots to root Fe<sup>2+</sup> deficiency was investigated using hydroponically grown <em>Astragalus mongholicus</em>, a widely cultivated medicinal plant. The root Fe<sup>2+</sup> deficiency significantly inhibited the plants' growth and the contents of Fe, Mo, as well as 10 metabolites, including -isorhamnetin-3-O-glucoside, and nepitrin, which have reported anti-inflammatory activities. The root Fe<sup>2+</sup> deficiency promoted the contents of Ca, Mg, K, Zn, Mn, and 12 metabolites, among which the glucoliquiritin apioside, an anti-infection flavonoid, strikingly increased by 2480.6 times. Transcriptome analysis revealed that Fe<sup>2+</sup> deficiency could impair cellular energy metabolism by inhibiting the expression of ATPase and other essential enzymes for the tricarboxylic acid cycle. The plants adapted to the stress by enhancing the expression of transcripts encoding V-type H<sup>+</sup>-ATPases, Ca<sup>2+</sup> and Mg<sup>2+</sup> transporting ATPases, Fe<sup>2+</sup> storage protein ferritins, as well as receptor like kinase and phytohormone-related transcription factors. In the transcriptome, a transcript encoding a functional Fe<sup>2+</sup> passive transporter was identified by complementing Fe<sup>2+</sup>/Zn<sup>2+</sup> uptake defective yeast mutants. The adaptation strategy of <em>Astragalus mongholicus</em> to the Fe<sup>2+</sup> deficiency and the potential for increasing glucoliquiritin apioside contents in the shoots by occasionally applying Fe<sup>2+</sup> chelators to the cultivating soils were discussed.</div></div>","PeriodicalId":16808,"journal":{"name":"Journal of plant physiology","volume":"317 ","pages":"Article 154679"},"PeriodicalIF":4.1,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145966310","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

Functional analysis of SlCDPK12 and its interacting protein SlACS11 in the regulation of tomato resistance to Phytophthora infestans SlCDPK12及其互作蛋白SlACS11调控番茄对疫霉抗性的功能分析

IF 4.1 3区生物学

Journal of plant physiology Pub Date : 2026-02-01 Epub Date: 2026-01-05 DOI: 10.1016/j.jplph.2026.154689

Yan Li , Jiaxuan Zhu , Ruili Lv, Zhengjie Wang, Huimin Li, Ruirui Yang, Yushi Luan

{"title":"Functional analysis of SlCDPK12 and its interacting protein SlACS11 in the regulation of tomato resistance to Phytophthora infestans","authors":"Yan Li , Jiaxuan Zhu , Ruili Lv, Zhengjie Wang, Huimin Li, Ruirui Yang, Yushi Luan","doi":"10.1016/j.jplph.2026.154689","DOIUrl":"10.1016/j.jplph.2026.154689","url":null,"abstract":"<div><div>Tomato (<em>Solanum lycopersicum</em>) is a globally important economic vegetable crop, but its growth and yield are often limited by biotic stresses. Calcium-dependent protein kinases (CDPKs), as key components of the Ca<sup>2+</sup> signaling pathway, play crucial roles in plant stress responses and have been extensively studied in relation to biotic stress adaptation. However, the specific role of CDPKs in tomato resistance to late blight (<em>Phytophthora infestans</em>) remains largely unclear. In this study, we demonstrated that <em>SlCDPK12</em> functions as a positive regulator of tomato resistance to <em>P. infestans</em>. Overexpression of <em>SlCDPK12</em> in the <em>P. infestans</em>-susceptible cultivar ZaoFen No.2 significantly enhanced resistance. This enhanced resistance was accompanied by elevated expression of pathogenesis-related (<em>PR</em>) genes and increased accumulation of reactive oxygen species (ROS). Using yeast two-hybrid screening, we identified SlACS11, a member of the 1-aminocyclopropane-1-carboxylic acid synthase (ACS) family, as a candidate interacting protein of SlCDPK12. Intriguingly, transient silencing of <em>SlACS11</em> enhanced tomato resistance to <em>P. infestans.</em> Overall, this research provides new insights into the molecular mechanisms underlying tomato resistance to <em>P. infestans</em> and contributes to our understanding of the biological functions of the CDPK gene family in plant-pathogen interactions.</div></div>","PeriodicalId":16808,"journal":{"name":"Journal of plant physiology","volume":"317 ","pages":"Article 154689"},"PeriodicalIF":4.1,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145927682","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

Localization of heterosis loci for quality traits and identification of candidate genes in Brassica napus 甘蓝型油菜品质性状杂种优势位点定位及候选基因鉴定。

IF 4.1 3区生物学

Journal of plant physiology Pub Date : 2026-02-01 Epub Date: 2025-12-31 DOI: 10.1016/j.jplph.2025.154687

Guoqiang Zheng , Ying Wang , Jiaping Wei , Zefeng Wu , Jinxiong Wang , Qi Yang , Junmei Cui , Yan Fang , Xiaoyun Dong , Xinyi Zhang , Qian Luo , Jiayue Yang , Zigang Liu

{"title":"Localization of heterosis loci for quality traits and identification of candidate genes in Brassica napus","authors":"Guoqiang Zheng , Ying Wang , Jiaping Wei , Zefeng Wu , Jinxiong Wang , Qi Yang , Junmei Cui , Yan Fang , Xiaoyun Dong , Xinyi Zhang , Qian Luo , Jiayue Yang , Zigang Liu","doi":"10.1016/j.jplph.2025.154687","DOIUrl":"10.1016/j.jplph.2025.154687","url":null,"abstract":"<div><div>The quality traits of rapeseed are critical genetic characteristics that determine seed value and its applications. Heterosis manifests not only in yield traits but also in quality traits. In this study, multiple interspecific and intraspecific hybrid crosses were generated to evaluate their heterosis effects. Our results demonstrated that the heterosis of oil content, oleic acid, linoleic acid, and linolenic acid was higher in the winter × spring crosses than in the winter × winter crosses, whereas the opposite was true for erucic acid and glucosinolate. Furthermore, we identified a substantial numerous SNP markers through targeted sequencing and mapped the heterosis-related loci for the corresponding traits in the F<sub>1</sub> population. A lot of 233, 46, 247, 192, 203, and 64 QTLs were identified as being associated with the seed traits of erucic acid, glucosinolates, oleic acid, linoleic acid, linolenic acid, oil content and their heterosis. These were consolidated into 425 consensus QTLs (cq-QTLs). By integrating RNA-seq data, we identified 10 pathways involved in lipid and pyruvate metabolism, among which 28 candidate genes were annotated. These conclusions showed that these cq-QTLs can serve as hotspots for mining regulatory genes related to the heterosis of rapeseed quality traits, laying a foundation for research on the heterosis of rapeseed quality traits.</div></div>","PeriodicalId":16808,"journal":{"name":"Journal of plant physiology","volume":"317 ","pages":"Article 154687"},"PeriodicalIF":4.1,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145917879","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

The cyclin-dependent kinase inhibitor SlKRP3 negatively regulates plant height and fruit shape in tomato via inhibiting cell elongation 周期蛋白依赖性激酶抑制剂SlKRP3通过抑制细胞伸长负向调节番茄植株高度和果实形状

IF 4.1 3区生物学

Journal of plant physiology Pub Date : 2026-02-01 Epub Date: 2026-01-10 DOI: 10.1016/j.jplph.2026.154694

Genzhong Liu , Xiaofang Liu , Jiaojiao Fan, Chaoyu Li, Wang Zheng, Fangfang Ma, Zhilong Bao

{"title":"The cyclin-dependent kinase inhibitor SlKRP3 negatively regulates plant height and fruit shape in tomato via inhibiting cell elongation","authors":"Genzhong Liu , Xiaofang Liu , Jiaojiao Fan, Chaoyu Li, Wang Zheng, Fangfang Ma, Zhilong Bao","doi":"10.1016/j.jplph.2026.154694","DOIUrl":"10.1016/j.jplph.2026.154694","url":null,"abstract":"<div><div>Plant height and fruit shape are significant traits affecting plant yield and appearance quality. Kip-related protein (KRP) is a cyclin-dependent kinase inhibitor that plays a critical role in the inhibition of cell cycle progression during plant development. However, the mechanism by which SlKRP3 regulates tomato plant height and fruit shape through cell cycle progression remains unclear. Here, we unveil functional characterization of <em>SlKRP3</em>, which is responsible for plant height and fruit shape in tomato. As expected, overexpression of <em>SlKRP3</em> resulted in shorter cell elongation and decreased endoreduplication in the tomato stem. VIGS assay was performed to obtain <em>SlKRP3</em>-silenced plants and demonstrated that silencing of <em>SlKRP3</em> increased plant height. Transcriptome analysis showed that the <em>xyloglucosyl transferase</em> genes are also dysregulated in <em>SlKRP3</em> overexpression lines, as are cell elongation and cell cycle-related genes. This argues that <em>SlKRP3</em> negatively regulates cell expansion via inhibiting endoreduplication in tomato. Notably, we uncover that SlKRP3 physically interacted with cyclin D3.1 by AlphaFold3, yeast two-hybrid, and bimolecular fluorescence complementation (BiFC) assays. These findings shed light on the functional regulation of <em>SlKRP3</em> and offer potential strategies for the genetic improvement of plant architecture and fruit shape in tomato.</div></div>","PeriodicalId":16808,"journal":{"name":"Journal of plant physiology","volume":"317 ","pages":"Article 154694"},"PeriodicalIF":4.1,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145978214","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

ABA receptors: function and post-translational modifications in plants ABA受体：在植物中的功能和翻译后修饰

IF 4.1 3区生物学

Journal of plant physiology Pub Date : 2026-02-01 Epub Date: 2026-01-08 DOI: 10.1016/j.jplph.2026.154692

Shaotong Qin, Qianqian Qin, Suiwen Hou

引用次数: 0

Detection and mapping of gm13, a QTL governing recessive resistance to rice gall midge 水稻瘿蚊隐性抗性QTL gm13的检测与定位

IF 4.1 3区生物学

Journal of plant physiology Pub Date : 2026-02-01 Epub Date: 2025-12-15 DOI: 10.1016/j.jplph.2025.154678

Fugang Huang , Chunlan Teng , Huayu Huang , Haiyan Cheng , Guihua Zhou , Ting Liu , Haojiang Zhu , Zhe Jiang , Shahzad Ahmad , Piqing Liu , Yongfu Qiu

{"title":"Detection and mapping of gm13, a QTL governing recessive resistance to rice gall midge","authors":"Fugang Huang , Chunlan Teng , Huayu Huang , Haiyan Cheng , Guihua Zhou , Ting Liu , Haojiang Zhu , Zhe Jiang , Shahzad Ahmad , Piqing Liu , Yongfu Qiu","doi":"10.1016/j.jplph.2025.154678","DOIUrl":"10.1016/j.jplph.2025.154678","url":null,"abstract":"<div><div>The Asian rice gall midge (RGM, <em>Orseolia oryzae</em> Wood-Mason) is a major devastating insect pest of rice, causing continuous damage from seedling to tillering stage. Its larvae invade the basal meristematic tissues of rice shoots, secreting effectors that induce the formation of characteristic hollow, tube-like structures known as ‘silver-shoot’, which inhibits panicle development. Deploying resistant cultivars harboring RGM resistance genes remains the most effective, environment-friendly, and sustainable management strategy, yet the discovery of novel resistance loci remains critical. We found that rice variety NY74 employs a combination of antixenotic and antibiotic defenses against RGM, without a hypersensitive response during the first 16 days of infestation. Genetic segregation analysis revealed that resistance in NY74 is governed by a single recessive locus, designated as <em>gm13</em>. Initial mapping using bulked segregant analysis (BSA) localized <em>gm13</em> to chromosome 8L. The identified quantitative trait locus (QTL) individually explained 41.7 % of the phenotypic variation, with likelihood of odd (LOD) score 14.3. Subsequently, high-resolution linkage analysis segregating progenies further refined the locus to an 82 kb interval between 18.33 Mb and 18.41 Mb. Functional annotation of the candidate region identified a resistance gene homolog, <em>gene1</em>, as the most promising candidate gene, characterized by a leucine-rich repeat domain. Both the gene location and recessive genetic mode distinguish <em>gm13</em> from other RGM resistance locus. Our findings provide a valuable genetic resource for breeding programs and advance the molecular understanding of rice immunity against gall midge.</div></div>","PeriodicalId":16808,"journal":{"name":"Journal of plant physiology","volume":"317 ","pages":"Article 154678"},"PeriodicalIF":4.1,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145771900","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

The assimilation of inorganic nitrogen by cluster and proteoid roots of Aspalathus linearis (Burm. f.) R. Dahlgren and Protea cynaroides (L.) L. in nutrient-poor ecosystems 杨梅簇状根和类蛋白根对无机氮的同化。f。)Dahlgren和cynaroides （L.）L.在营养贫乏的生态系统

IF 4.1 3区生物学

Journal of plant physiology Pub Date : 2026-02-01 Epub Date: 2026-01-12 DOI: 10.1016/j.jplph.2026.154703

Stian Griebenow , Lida - Mari Groenewald , Nokwanda Makunga , Maik Veste , Paul Hills , Aleysia Kleinert , Alexander Valentine

{"title":"The assimilation of inorganic nitrogen by cluster and proteoid roots of Aspalathus linearis (Burm. f.) R. Dahlgren and Protea cynaroides (L.) L. in nutrient-poor ecosystems","authors":"Stian Griebenow , Lida - Mari Groenewald , Nokwanda Makunga , Maik Veste , Paul Hills , Aleysia Kleinert , Alexander Valentine","doi":"10.1016/j.jplph.2026.154703","DOIUrl":"10.1016/j.jplph.2026.154703","url":null,"abstract":"<div><div>Certain plant families have evolved cluster (or proteoid) roots, which facilitate their survival in nutrient-poor ecosystems, specifically related to phosphorus impoverished environments, such as in South Africa, South Western Australia and Chile. Most cluster (or proteoid) rooted studies have focused on their capacity for phosphate acquisition, while in nutrient-poor ecosystems along with phosphate, nitrogen is the most limiting for plant growth. The role of cluster (or proteoid) roots in nitrogen nutrition is poorly understood. Therefore, in a field based experiments two cluster/proteoid rooted species, <em>Protea cynaroides</em> (L.) L. and <em>Aspalathus linearis</em> (Burm. f.) R. Dahlgren, the cluster/proteoid root capacity for inorganic nitrogen assimilation and organic nitrogen recycling utilising was assessed utilising an enzymatic approach. It was shown that cluster/proteoid roots are able to assimilate both NH<sub>4</sub><sup>+</sup> and NO<sub>3</sub><sup>−</sup> through the enzyme activities of Glutamine synthase (GS) (EC 6.3.1.2) and Nitrate reductase (NR) (EC 1.7.1.1). Additionally, cluster/proteoid roots were also able to recycle amino acids into other useable forms. The assimilation and recycling of inorganic - and organic nitrogen by cluster/proteoid roots along with their capacity for phosphorus mobilisation, provides insight into how cluster/proteoid roots form part of a larger system in which belowground organs are integrated to acquire scarce resources.</div></div>","PeriodicalId":16808,"journal":{"name":"Journal of plant physiology","volume":"317 ","pages":"Article 154703"},"PeriodicalIF":4.1,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145978283","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