Journal of Plant Research最新文献_第3页

How sterols affect protoplasts plasma membrane water permeability and their volume under osmotic shock. 甾醇如何影响原生质体在渗透冲击下的质膜透水性及其体积。

IF 2.7 3区生物学

Journal of Plant Research Pub Date : 2025-01-01 Epub Date: 2024-11-28 DOI: 10.1007/s10265-024-01599-0

Nikita K Lapshin, Michail S Piotrovskii, Marina S Trofimova

{"title":"How sterols affect protoplasts plasma membrane water permeability and their volume under osmotic shock.","authors":"Nikita K Lapshin, Michail S Piotrovskii, Marina S Trofimova","doi":"10.1007/s10265-024-01599-0","DOIUrl":"10.1007/s10265-024-01599-0","url":null,"abstract":"Protoplasts isolated from Arabidopsis leaves were used to study the initial stages of the plant cell response to osmotic stress. The role of sterols in these processes was investigated by their extraction from the protoplast plasma membrane in the presence of the oligosaccharide - methyl-β-cyclodextrin (MβCD). Depletion of membrane sterols caused by MβCD treatment did not alter protoplast volume under isosmotic conditions; however, volumes changed significantly when protoplasts were exposed to osmotic stress. Estimation of the plasma membrane water permeability coefficient (Pos), calculated from the initial rate of protoplast osmotic shrinkage, showed that control suspension is characterized by a high dispersion of the Pos values. However, Pos became more homogeneous after plasma membrane sterol depletion. Protoplasts were stained with FM 1-43 to assess how sterol extraction affects vesicular transport under osmotic shock. In order to determine the protoplast non-osmotic volume (Vb) steady-state volumes at different external osmolarities were fitted with linear dependences of the Boyle-van't Hoff (BVH) plot. It was found that sterol extraction is accompanied by a change in the slope of the BVH plot and a decrease in the apparent Vb. Several possible mechanisms behind the change in the protoplast volume and plasma membrane Pos regulation by sterols under osmotic stress are discussed.","PeriodicalId":16813,"journal":{"name":"Journal of Plant Research","volume":" ","pages":"161-172"},"PeriodicalIF":2.7,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142750661","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

Exploring sugar allocation and metabolic shifts in cassava plants infected with Cassava common mosaic virus (CsCMV) under long-day photoperiod: diel changes in source and sink leaves. 探索长日光周期下感染木薯普通花叶病毒（CsCMV）的木薯植株的糖分分配和代谢转变：源叶和汇叶的昼夜变化。

IF 2.7 3区生物学

Journal of Plant Research Pub Date : 2025-01-01 Epub Date: 2024-11-19 DOI: 10.1007/s10265-024-01595-4

Andrea A Zanini, Martin C Dominguez, Marianela S Rodríguez

{"title":"Exploring sugar allocation and metabolic shifts in cassava plants infected with Cassava common mosaic virus (CsCMV) under long-day photoperiod: diel changes in source and sink leaves.","authors":"Andrea A Zanini, Martin C Dominguez, Marianela S Rodríguez","doi":"10.1007/s10265-024-01595-4","DOIUrl":"10.1007/s10265-024-01595-4","url":null,"abstract":"Cassava common mosaic virus (CsCMV) is a potexvirus that impairs chloroplast and metabolism, causing significant yield losses to cassava crops. Crop yield depends on diel rhythms, influencing carbon allocation and growth, and sugar signaling also impacting light-dark rhythms. This study aimed to elucidate the early impact of CsCMV infection on diel carbon allocation, metabolism, and defense mechanisms in both source and sink cassava leaves before storage root bulking. Soluble sugar and starch concentrations were examined over a 24-h cycle (16:8 photoperiod) in CsCMV-infected plants. The expression of an array of genes-carbohydrate metabolism, SnRK1 activity marker, defense, circadian marker-was analyzed at ZT6, ZT16 and ZT24/ZT0. In CsCMV-infected source leaves, at ZT6, sucrose increased whereas glucose, fructose and sucrose rose at night. An increase in Suc:hexose ratio and upregulation of SnRK1 activity marker genes and PR1 transcripts were found in infected leaves, suggesting a combination of altered carbon metabolism and defense response mechanisms against the viral infection. GIGANTEA, a clock-controlled gene, showed a reduced expression in infected leaves at ZT6 and ZT24/ZT0, suggesting a circadian phase shift compared with uninfected control plants. Additionally, starch mobilization transcripts were downregulated at ZT24/ZT0, though starch content remained unchanged during the 24-h cycle. In sink leaves, a transient peak of maltose (ZT6) was observed. Our findings suggest that CsCMV disrupts the plant's natural rhythms of sugar metabolism and allocation. Spikes in sucrose levels may serve as infection signals in the internal daily clock of the plant, influencing plant responses during the cassava-CsCMV interaction.","PeriodicalId":16813,"journal":{"name":"Journal of Plant Research","volume":" ","pages":"131-145"},"PeriodicalIF":2.7,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142667837","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

Comparative transcriptome reveals lignin biosynthesis being the key molecular pathway regulating oilseed rape growth treated by SiO₂ NPs and biochar. 比较转录组显示，木质素生物合成是调节经二氧化硅氮氧化物和生物炭处理的油菜生长的关键分子途径。

IF 2.7 3区生物学

Journal of Plant Research Pub Date : 2025-01-01 Epub Date: 2024-11-13 DOI: 10.1007/s10265-024-01590-9

Ziming Wang, Ziyue Wang, Zhaodi Zhang, Qiong Lu, Yikun Sheng, Xiangyuan Song, Ruipeng Huo, Juyuan Wang, Sheng Zhai

{"title":"Comparative transcriptome reveals lignin biosynthesis being the key molecular pathway regulating oilseed rape growth treated by SiO2 NPs and biochar.","authors":"Ziming Wang, Ziyue Wang, Zhaodi Zhang, Qiong Lu, Yikun Sheng, Xiangyuan Song, Ruipeng Huo, Juyuan Wang, Sheng Zhai","doi":"10.1007/s10265-024-01590-9","DOIUrl":"10.1007/s10265-024-01590-9","url":null,"abstract":"Biochar and SiO2 NPs are effective soil conditioners, but the impacts and mechanisms of combined application in oilseed rape are not yet clear. Therefore, an experiment was designed to investigate oilseed rape growth, physiological indexes, and transcriptome sequencing under four treatments: control (CK), Platanus orientalis L. leaf biochar (B), SiO2 NPs (S), and BS. Our results showed that B, S and BS treatments all promoted the root growth, root activity and biomass of oilseed rape, especially the root length and fresh weight in BS, which were increased by 77.48% and 279.07%, respectively. Moreover, the three-dimensional fluorescence spectra of B and BS were similar, and the tyrosine-like substance proportion in B, S and BS increased from 7.8 to 9.4%, 10.2% and 19.5%, respectively. In transcriptome analysis, there were 10,280 differentially expressed genes (DEGs) shared in B and BS, 3431 DEGs shared in S and BS, and 2815 DEGs shared in B, S and BS. We also found that B, S and BS all regulated oilseed rape growth by inducing the lignin biosynthesis and the relevant genes encoding BBE-like, BGL, UDP in the phenylpropanoid biosynthesis pathway. The results provide gene regulation associated with the phenylpropanoid biosynthesis applying the biochar and SiO2 NPs, which can be used to increase biomass.","PeriodicalId":16813,"journal":{"name":"Journal of Plant Research","volume":" ","pages":"147-159"},"PeriodicalIF":2.7,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142622640","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

Identification and functional analysis of the Dof transcription factor genes in sugar beet. 甜菜中 Dof 转录因子基因的鉴定和功能分析。

IF 2.7 3区生物学

Journal of Plant Research Pub Date : 2025-01-01 Epub Date: 2024-10-10 DOI: 10.1007/s10265-024-01588-3

Yaqing Sun, Yongfeng Zhang, Caiyuan Jian, Tong Wang, Guoli Cao, Ningning Li, Guolong Li, Shaoying Zhang

引用次数: 0

Synergistic effect of alkane and membrane lipid alteration in Synechococcus elongatus PCC 7942 under salt and light stresses. 盐和光胁迫下长聚球菌PCC 7942中烷烃和膜脂改变的协同效应

IF 2.7 3区生物学

Journal of Plant Research Pub Date : 2024-12-31 DOI: 10.1007/s10265-024-01613-5

Arif Agung Wibowo, Koichiro Awai

{"title":"Synergistic effect of alkane and membrane lipid alteration in Synechococcus elongatus PCC 7942 under salt and light stresses.","authors":"Arif Agung Wibowo, Koichiro Awai","doi":"10.1007/s10265-024-01613-5","DOIUrl":"https://doi.org/10.1007/s10265-024-01613-5","url":null,"abstract":"Salinity and light markedly influence cyanobacterial viability. High salinity disrupts the osmotic balance, while excess light energy affects redox potential in the cells. Regulating the ratio of saturated and unsaturated alka(e)ne and fatty acids in cyanobacteria is thought to have crucial roles in coping with these stresses by regulating membrane fluidity. In Synechococcus elongatus PCC 7942 (Syn7942), alkane is produced from fatty acid metabolites using acyl-acyl carrier protein reductase (Aar) and aldehyde-deformylating oxygenase (Ado) enzymes. However, the role of alka(e)nes and their correlation with fatty acid-related compounds, especially under salinity stress, is not yet fully understood. This study explored the significance of the natural alka(e)ne biosynthesis pathway using Syn7942. The role of alka(e)ne was assessed using single and double knockout mutants of the aar and/or ado genes in this biosynthetic process. The alka(e)ne levels and membrane lipid content exhibited an inverse relationship, correlating with cell fluidity under high-salinity and high-light conditions. The absence of alka(e)ne resulted in a severe growth phenotype of Δado and Δaar/Δado under high-salinity conditions and less severe under high-light conditions. In addition, feeding with C15:0 and/or C17:0 alkanes complemented the growth phenotype with different accumulation profiles. The Δaar mutant exhibited higher resistance to high salinity than the Syn7942 WT, indicating the importance of Ado for survival at high salinity. Overall, lipid-related compounds, especially alka(e)nes, markedly contribute to cell integrity maintenance under high-salinity conditions by regulating membrane rigidity and fluidity.","PeriodicalId":16813,"journal":{"name":"Journal of Plant Research","volume":" ","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142909806","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

Molecular characterization of a novel photoperiod-insensitive allele Ppd-B1a.3 and its effect on heading date in Chinese wheat (Triticum aestivum) cultivar Qingchun 37. 新型光周期不敏感等位基因Ppd-B1a的分子特征。3型及其对春小麦37号抽穗期的影响。

IF 2.7 3区生物学

Journal of Plant Research Pub Date : 2024-12-31 DOI: 10.1007/s10265-024-01609-1

Tianqi Song, Caiyin Shi, Yukun Wang, Sihai Guo, Weijun Zhang, Xiaoxing Wang, Jianfei Zhou, Yaning Bu, Siyi Li, Qiru Fan, Fan Wei, Jishan Xiang, Dongsheng Chen, Xiaoke Zhang

{"title":"Molecular characterization of a novel photoperiod-insensitive allele Ppd-B1a.3 and its effect on heading date in Chinese wheat (Triticum aestivum) cultivar Qingchun 37.","authors":"Tianqi Song, Caiyin Shi, Yukun Wang, Sihai Guo, Weijun Zhang, Xiaoxing Wang, Jianfei Zhou, Yaning Bu, Siyi Li, Qiru Fan, Fan Wei, Jishan Xiang, Dongsheng Chen, Xiaoke Zhang","doi":"10.1007/s10265-024-01609-1","DOIUrl":"https://doi.org/10.1007/s10265-024-01609-1","url":null,"abstract":"Breeders adjust wheat heading dates to improve regional adaptability and reduce or mitigate yield losses caused by meteorological disasters, pests and diseases. The Ppd-1 genes play a crucial role in determining wheat sensitivity to changes in day-length and serve as key regulators of heading dates once the vernalization requirement is satisfied. In this study, we identified a new allelic variant of the promoter region, Ppd-B1a.3, in the Chinese wheat cultivar Qingchun 37. Compared to the Ppd-B1b.1 (carried by Chihokukomugi), the main mutation sites in Ppd-B1a.3 include a substitution of C with G at the -505-bp, a T base insertion at the -625-bp, a mutation of TCG to GGT at the -632 to -634-bp, and a 163-bp insertion at the -691 bp. Analysis of F2 populations indicated that Ppd-B1a.3 promotes heading and flowering (approximately 6 days earlier in population 1 and 17 days in population 2) under short-day conditions in a greenhouse. However, the evaluation of Ppd-B1a.3's effect under field conditions may be influenced by the copy number of the Ppd-B1 locus inherited from the other parent in the F2 populations. Ppd-B1a.3 disrupts circadian rhythm expression and exhibits a stronger effect on heading and flowering than the three-copy Ppd-B1 allele carried by Jing 411. Origin analysis suggests that Ppd-B1a.3 may have derived from non-native germplasm. These results deepen our understanding of wheat photoperiod genes and provide useful genetic resources for fine-tuning wheat heading dates during breeding.","PeriodicalId":16813,"journal":{"name":"Journal of Plant Research","volume":" ","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142909804","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

Floral developmental insights into two species of Erythrina (Fabaceae: Papilionoideae: Phaseoleae) pollinated by hummingbirds and passerines. 由蜂鸟和雀形目传粉的两种丹参（豆科：凤蝶科：菜花科）的花发育研究。

IF 2.7 3区生物学

Journal of Plant Research Pub Date : 2024-12-27 DOI: 10.1007/s10265-024-01610-8

Lukas Gabriel Macedo Pessanha de Souza, Marcus José de Azevedo Falcão, João Paulo Basso-Alves, Vidal de Freitas Mansano

{"title":"Floral developmental insights into two species of Erythrina (Fabaceae: Papilionoideae: Phaseoleae) pollinated by hummingbirds and passerines.","authors":"Lukas Gabriel Macedo Pessanha de Souza, Marcus José de Azevedo Falcão, João Paulo Basso-Alves, Vidal de Freitas Mansano","doi":"10.1007/s10265-024-01610-8","DOIUrl":"https://doi.org/10.1007/s10265-024-01610-8","url":null,"abstract":"Erythrina is a Pantropical bird-pollinated genus of Fabaceae. Thus, its flowers are usually large, showy, red or yellowish, offering nectar as the principal resource. There are two main interaction systems with birds in Erythrina: in one, the inflorescences are erect and the flowers are horizontal, offering no landing platform; in the other, the inflorescences are horizontal and the flower parts are more exposed. Erythrina speciosa is pollinated by hummingbirds and E. poeppigiana is pollinated by passerines. Despite their structural variation, little is known about how species of the same genus diverge ontogenetically to form flowers adapted to pollinators with different beak morphology and feeding behaviors. Therefore, this study aimed to investigate floral development in two species according to their pollination system. Flowers and buds were collected and fixed for analysis using scanning electron microscopy and light microscopy. Some characteristics are common to both species: the formation of a pseudoracemose inflorescence, the unidirectional emergence of floral organs, and the formation of a short staminal sheath involving nine of the ten stamens (diadelphous androecium). Other characteristics, notably those related to the late stages of floral development, gradually diverged. Among them are inflorescence formation pattern; the formation of reduced and free keel petals in E. speciosa, while in E. poeppigiana they are longer and postgenitally united by their lower margins; and the participation of the standard in the floral display. The studied species share several traits common to other Papilionoideae, but some similarities between the species studied may not be phylogenetically related and reveal the potential ontogenetic pathways of functional convergence that flowers have experienced throughout evolution in the genus.","PeriodicalId":16813,"journal":{"name":"Journal of Plant Research","volume":" ","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142895395","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

Chlorophyll fluorescence responses to CO₂ availability reveal crassulacean acid metabolism in epiphytic orchids. 叶绿素荧光对CO2有效性的响应揭示了附生兰花的天冬酰胺酸代谢。

IF 2.7 3区生物学

Journal of Plant Research Pub Date : 2024-12-24 DOI: 10.1007/s10265-024-01608-2

Sae Bekki, Kenji Suetsugu, Koichi Kobayashi

{"title":"Chlorophyll fluorescence responses to CO2 availability reveal crassulacean acid metabolism in epiphytic orchids.","authors":"Sae Bekki, Kenji Suetsugu, Koichi Kobayashi","doi":"10.1007/s10265-024-01608-2","DOIUrl":"https://doi.org/10.1007/s10265-024-01608-2","url":null,"abstract":"Crassulacean acid metabolism (CAM), a specialized mode of photosynthetic carbon assimilation characterized by nocturnal fixation of atmospheric CO2 and vacuolar malic acid storage, is found in a wide variety of vascular plant species, mainly those inhabiting water-limited environments. Identifying and characterizing diverse CAM species enhances our understanding of the physiological, ecological, and evolutionary significance of CAM photosynthesis. In this study, we examined the effect of CO2 elimination on chlorophyll fluorescence-based photosynthetic parameters in two constitutive CAM Kalanchoe species and six orchids. In CAM-performing Kalanchoe species, the effective quantum yield of photosystem II showed no change in response to CO2 elimination during the daytime but decreased with CO2 elimination at dusk. We applied this method to reveal the photosynthetic mode of epiphytic orchids and found that Gastrochilus japonicus, Oberonia japonica, and Bulbophyllum inconspicuum, but not B. drymoglossum, are constitutive CAM plants, which were also confirmed by malate determination. Our data propose a novel approach to identify and characterize CAM plants without labor-intensive experimental procedures. Although B. drymoglossum leaves had relatively high malate content, they did not depend on it to perform photosynthesis even under water-deficient or increased light conditions. Anatomical comparisons revealed a notable difference in leaf structure between B. drymoglossum and B. inconspicuum; B. drymoglossum leaves possess large water storage tissue internally, unlike B. inconspicuum leaves, which develop pseudobulbs. Our findings suggest different evolutionary adaptations to water deficit between closely related B. drymoglossum and B. inconspicuum.","PeriodicalId":16813,"journal":{"name":"Journal of Plant Research","volume":" ","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142882184","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

Plastidial thioredoxin-like proteins are essential for normal embryogenesis and seed development in Arabidopsis thaliana. 拟南芥叶绿体硫氧还蛋白样蛋白是正常胚胎发生和种子发育所必需的。

IF 2.7 3区生物学

Journal of Plant Research Pub Date : 2024-12-21 DOI: 10.1007/s10265-024-01611-7

Yuka Fukushi, Yuichi Yokochi, Toru Hisabori, Keisuke Yoshida

{"title":"Plastidial thioredoxin-like proteins are essential for normal embryogenesis and seed development in Arabidopsis thaliana.","authors":"Yuka Fukushi, Yuichi Yokochi, Toru Hisabori, Keisuke Yoshida","doi":"10.1007/s10265-024-01611-7","DOIUrl":"https://doi.org/10.1007/s10265-024-01611-7","url":null,"abstract":"Thiol/disulfide-based redox regulation is a key mechanism for modulating protein functions in response to changes in cellular redox status. Two thioredoxin (Trx)-like proteins [atypical Cys His-rich Trx (ACHT) and Trx-like2 (TrxL2)] have been identified as crucial for oxidizing and deactivating several chloroplast enzymes during light-to-dark transitions; however, their roles remain to be fully understood. In this study, we investigated the functions of Trx-like proteins in seed development. Using the CRISPR/Cas9 system, we generated an Arabidopsis quadruple mutant defective in ACHT1, ACHT2, TrxL2.1, and TrxL2.2 (acht/trxl2). This mutant showed increased seed lethality prior to maturation, with embryogenesis impaired primarily during the heart and torpedo stages, which are critical phases for plastid differentiation into chloroplasts. Using transgenic plants expressing EGFP-fused proteins, we confirmed that ACHT and TrxL2 are localized in plastids during embryogenesis. Additionally, seed development in the acht/trxl2 mutant was further impaired under extended darkness and could not be recovered through complementation with variants of ACHT or TrxL2 lacking the redox-active Cys residue (replaced by Ser). These findings indicate that the protein-oxidation functions of ACHT and TrxL2 are important for plastid differentiation into chloroplasts, embryogenesis, and seed development.","PeriodicalId":16813,"journal":{"name":"Journal of Plant Research","volume":" ","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142872396","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

Seasonal changes in pigment content in overwintering and current-year leaves of Sasa senanensis from snowmelt to before leaf-fall of canopy deciduous trees. 雪融雪期至冠层落叶树落叶前雪沙越冬叶和年叶色素含量的季节变化

IF 2.7 3区生物学

Journal of Plant Research Pub Date : 2024-12-17 DOI: 10.1007/s10265-024-01607-3

Kiyomi Ono, Megumi Hashiguchi, Ryouichi Tanaka, Toshihiko Hara

{"title":"Seasonal changes in pigment content in overwintering and current-year leaves of Sasa senanensis from snowmelt to before leaf-fall of canopy deciduous trees.","authors":"Kiyomi Ono, Megumi Hashiguchi, Ryouichi Tanaka, Toshihiko Hara","doi":"10.1007/s10265-024-01607-3","DOIUrl":"https://doi.org/10.1007/s10265-024-01607-3","url":null,"abstract":"Sasa senanensis (a dwarf bamboo), an evergreen herbaceous plant native to the cool temperate regions of eastern Asia, endures seasonal temperature fluctuations and significant variations in light intensity typical for understory plants. Following snowmelt in early spring, the light intensity received by Sasa leaves surges, then diminishes as the canopy of upper deciduous trees develops. The current-year leaves of S. senanensis unfold under these shaded conditions, rendering the preservation of overwintering leaves vital for maintaining photosynthetic productivity in early spring. This study investigated the adaptations of overwintering leaves of S. senanensis to the low temperatures and elevated light conditions typical of early spring, examining whether these leaves dissipate absorbed light energy as heat and/or reduce their antenna size in response to increased light levels. Comprehensive analyses of Fv/Fm and photosynthetic pigment compositions were conducted throughout the spring to autumn seasons from 2014 to 2017. Our results indicate that Fv/Fm in overwintering leaves was initially low in early spring but increased gradually before the onset of shading, maintaining high levels under shaded conditions across all examined years. The chlorophyll a/b ratio increased post-snowmelt and decreased with intensified shading annually, with the exception of 2015, suggesting that reductions in antenna size are not essential for Fv/Fm recovery. Furthermore, the quantities and de-epoxidation state of xanthophyll cycle pigments increased after snowmelt despite rising temperatures, then decreased with progressive shading each year, indicating that overwintering leaves adapt to early spring conditions by modulating their xanthophyll cycle pigments. This study demonstrates that the overwintering leaves of S. senanensis exhibit a flexible response in photosystem pigments to variations in the light environment.","PeriodicalId":16813,"journal":{"name":"Journal of Plant Research","volume":" ","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142835904","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