Physiologia plantarum最新文献

Transgenic Cynodon dactylon overexpressing CdPIF4 alters plant development and cold stress tolerance. 过表达CdPIF4的转基因Cynodon dactylon改变了植物的发育和对冷胁迫的耐受性。

IF 5.4 2区生物学

Physiologia plantarum Pub Date : 2025-01-01 DOI: 10.1111/ppl.70025

Xiao Xu, Xiaoyan Liu, Yanling Yin, Shugao Fan, Yunjie Qi, Yiquan Xing, Jinmin Fu

{"title":"Transgenic Cynodon dactylon overexpressing CdPIF4 alters plant development and cold stress tolerance.","authors":"Xiao Xu, Xiaoyan Liu, Yanling Yin, Shugao Fan, Yunjie Qi, Yiquan Xing, Jinmin Fu","doi":"10.1111/ppl.70025","DOIUrl":"https://doi.org/10.1111/ppl.70025","url":null,"abstract":"Bermudagrass [Cynodon dactylon (L.) Pers.] is widely used for soil remediation, livestock forage, and as turfgrass for sports fields, parks, and gardens due to its resilience and adaptability. However, low temperatures are critical factors limiting its geographical distribution and ornamental season, even preventing its safe overwintering. PHYTOCHROME-INTERACTING FACTOR 4 (PIF4) acts as a hub transcription factor, not only regulating various light responses but also integrating multiple external stimuli to improve plant productivity and architectural adaptation under adverse stress conditions, which makes it potential as a target gene. In this study, we cloned and characterized the CdPIF4 genes in bermudagrass. Expression analysis revealed that it is predominantly expressed in leaves and is regulated by photoperiod and cold stress. Using Agrobacterium-mediated genetic modification, we successfully generated CdPIF4a-overexpressing bermudagrass lines. Under cold stress at 4°C, these transgenic plants demonstrated enhanced cold tolerance, as indicated by higher relative water content, reduced membrane damage, and lower levels of lipid peroxidation levels. Photosynthetic analysis revealed that CdPIF4a-overexpressing plants exhibited higher light energy capture and transfer efficiency at this low temperature, with less energy loss. Additionally, they showed higher antioxidant enzyme activity and lower levels of reactive oxygen species levels. The responsive regulation of cold stress-related genes further validated the role of the CdPIF4a gene in enhancing cold tolerance. This study elucidates that CdPIF4 enhances cold tolerance in bermudagrass through physiological and molecular mechanisms, offering new insights and valuable genetic resources for advancing cold resistance research in bermudagrass and other grass species.","PeriodicalId":20164,"journal":{"name":"Physiologia plantarum","volume":"177 1","pages":"e70025"},"PeriodicalIF":5.4,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142915255","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 molecular mechanism of transforming red light signal to (E)-β-caryophyllene biosynthesis in Arabidopsis. 拟南芥将红光信号转化为(E)-β-石竹烯生物合成的分子机制

IF 5.4 2区生物学

Physiologia plantarum Pub Date : 2025-01-01 DOI: 10.1111/ppl.70065

Chuanjia Xu, Xin Wang, Malakkhanim Mehraliyeva, Jia Sun, Fangfang Chen, Changfu Li, Zhengqin Xu, Nan Tang, Yansheng Zhang

引用次数: 0

Evolutionary dynamics of nitrate uptake, assimilation, and signalling in plants: adapting to a changing environment. 植物对硝酸盐吸收、同化和信号传导的进化动力学：适应不断变化的环境。

IF 5.4 2区生物学

Physiologia plantarum Pub Date : 2025-01-01 DOI: 10.1111/ppl.70069

Xiaojia Zhang, Shufeng Bai, Hui Min, Yuxuan Cui, Yibo Sun, Yulong Feng

{"title":"Evolutionary dynamics of nitrate uptake, assimilation, and signalling in plants: adapting to a changing environment.","authors":"Xiaojia Zhang, Shufeng Bai, Hui Min, Yuxuan Cui, Yibo Sun, Yulong Feng","doi":"10.1111/ppl.70069","DOIUrl":"https://doi.org/10.1111/ppl.70069","url":null,"abstract":"Nitrogen (N) is a crucial macronutrient for plant growth, with nitrate as a primary inorganic N source for most plants. Beyond its role as a nutrient, nitrate also functions as a signalling molecule, influencing plant morphogenetic development. While nitrate utilization and signalling mechanisms have been extensively studied in model plants, the origin, evolution, and diversification of core components in nitrate uptake, assimilation, and signalling remain largely unexplored. In our investigation, we discovered that deep sea algae living in low nitrate conditions developed a high-affinity transport system (HATS) for nitrate uptake and a pathway of nitrate primary assimilation (NR-NiR-GS-GOGAT). In contrast, low-affinity transport systems (LATS) and the plastid GS originated from the ancestors of land and seed plants, respectively. These adaptations facilitated amino acid acquisition as plants conquered terrestrial environments. Furthermore, the intricate nitrate signalling, relying on NRT1.1 and NLP7, evolved stepwise, potentially establishing systematic regulation in bryophytes for self-regulation under complex terrestrial nitrate environments. As plants underwent terrestrialization, they underwent adaptive changes to thrive in dynamic nitrate environments, continually enhancing their nitrate uptake, assimilation, and signal transduction abilities.","PeriodicalId":20164,"journal":{"name":"Physiologia plantarum","volume":"177 1","pages":"e70069"},"PeriodicalIF":5.4,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143009990","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Use of stored carbon for new organ development in apple saplings in early spring for two consecutive years after ¹³C labelling. 13C标记后连续两年苹果幼树早春贮藏碳对新器官发育的影响。

IF 5.4 2区生物学

Physiologia plantarum Pub Date : 2025-01-01 DOI: 10.1111/ppl.70077

Shogo Imada, Yasuhiro Tako

{"title":"Use of stored carbon for new organ development in apple saplings in early spring for two consecutive years after 13C labelling.","authors":"Shogo Imada, Yasuhiro Tako","doi":"10.1111/ppl.70077","DOIUrl":"https://doi.org/10.1111/ppl.70077","url":null,"abstract":"The use of stored carbon is essential for new organ development in deciduous trees during early spring. However, the contribution of carbon to the development of new organs in early spring of subsequent years is not well understood. Using a 13C labelling approach, we investigated the reallocation of assimilated carbon into new aboveground organs on apple (Malus domestica) saplings in the following two years. Eight three-year-old potted saplings were exposed to 13CO2 in an exposure chamber on each of eight different dates during the growth season. Some of the trees were harvested in the late autumn of the same year. The remaining trees were transferred to a field and cultivated during the two following growing seasons. We directly showed that the assimilated 13C was used to develop terminal and flower buds for two consecutive years after labelling. The proportions of the concentration of 13C remobilized to the terminal and flower buds in the second year were 5 and 24% of those in the first year after labelling, respectively. The concentration of assimilated 13C was higher in the terminal buds than in the flower buds in the first year after the labelling, while opposite results were found in the second year. This study demonstrates that the stored carbon used for the development of new organs was a mixture of recent- and old-stored carbon and indicates that recently-stored carbon was preferentially used to develop new organs. We also indicated that the stored carbon was remobilized to flower buds during development.","PeriodicalId":20164,"journal":{"name":"Physiologia plantarum","volume":"177 1","pages":"e70077"},"PeriodicalIF":5.4,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143009528","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 spatiotemporal changes of metabolites in Pinellia ternata at different development stages by MALDI-MSI. 利用MALDI-MSI研究半夏不同发育阶段代谢物的时空变化。

IF 5.4 2区生物学

Physiologia plantarum Pub Date : 2025-01-01 DOI: 10.1111/ppl.70049

Yifei Pei, Xue Feng, Ziyi Liu, Jialei Chen, Jialu Wang, Xiangyu Zhang, Haitao Liu, Xiwen Li

{"title":"The spatiotemporal changes of metabolites in Pinellia ternata at different development stages by MALDI-MSI.","authors":"Yifei Pei, Xue Feng, Ziyi Liu, Jialei Chen, Jialu Wang, Xiangyu Zhang, Haitao Liu, Xiwen Li","doi":"10.1111/ppl.70049","DOIUrl":"https://doi.org/10.1111/ppl.70049","url":null,"abstract":"Pinellia ternata is an herb species in the Pinellia genus with significant economic value due to its medicinal properties. Understanding the accumulation and spatial distribution characteristics of metabolites during the development of the medicinal part, the rhizome of P. ternata (PR), provides a basis for targeted metabolic regulation and quality evaluation. In this study, we used matrix-assisted laser desorption/ionization mass spectrometry imaging (MALDI) and MS/MS to analyse metabolites at 5 representative stages (S1 to S5) of rhizome development in cross and longitudinal sections of the rhizome. A total of 168 metabolites were detected, with 13 being metabolites previously reported in PR. Additionally, Venn analysis revealed 12 bioactive differential metabolites during the growth process. Their spatial distribution and composition were analyzed, showing that alkaloids and amino acids were significantly distributed throughout the entire region and had higher relative contents compared to other metabolites. Flavonoids were more distributed in the outer regions of PR, potentially playing a greater role in combating biotic or abiotic stresses. Specifically, in cross-sections, arginine, nicotinamide, and 2-pentylpyridine showed a clear trend of accumulation from the outer to the inner from S1 to S5, while trigonelline, adenosine, cytidine, 3,4-dihydroxycinnamyl alcohol, raffinose, choline alfoscerate, liquiritin, and apii exhibited the opposite trend. For longitudinal sections, trigonelline, 2-pentylpyridine, choline alfoscerate and baicalein showed a trend of accumulation from the area of bud end to the far region during S1 to S5, while arginine showed opposite distribution trends. These findings deepen our understanding of the metabolic processes involved in the development of PR and have potential implications for variety improvement and quality control.","PeriodicalId":20164,"journal":{"name":"Physiologia plantarum","volume":"177 1","pages":"e70049"},"PeriodicalIF":5.4,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143009346","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Genetic diversity and population structure analysis of short-day onions using molecular markers in association with resistance to Fusarium basal rot. 短日洋葱抗枯萎病遗传多样性及群体结构分析。

IF 5.4 2区生物学

Physiologia plantarum Pub Date : 2025-01-01 DOI: 10.1111/ppl.70042

SaeidReza Poursakhi, Hossein Ali Asadi-Gharneh, Mehdi Nasr-Esfahani, Zahra Abbasi, Hamed Hassanzadeh Khankahdani

{"title":"Genetic diversity and population structure analysis of short-day onions using molecular markers in association with resistance to Fusarium basal rot.","authors":"SaeidReza Poursakhi, Hossein Ali Asadi-Gharneh, Mehdi Nasr-Esfahani, Zahra Abbasi, Hamed Hassanzadeh Khankahdani","doi":"10.1111/ppl.70042","DOIUrl":"https://doi.org/10.1111/ppl.70042","url":null,"abstract":"In this research, we analyzed Random Amplified Polymorphic DNA (RAPD), Inter Simple Sequence Repeats (ISSR) and Sequence-related amplified polymorphism (SRAP) markers to evaluate the genetic diversity of eighteen different onion genotypes with various resistant levels to FOC. The results showed that the polymorphism means between RAPD primers was 61.11 to 81.81%; ISSR primers, 62.50 to 81.81%; and SRAP primers, 56.25 to 76.25%. Overall, by assessing MI, PIC, I and H indices, indicating the best thrive in evaluating the genetic diversity of the related onion populations. There is a significant correlation between the generated dendrograms based on similarity matrices. The classification pattern in dendrograms shows a corresponding correlation with the FOC disease severity bunches. So in all three markers studied, 'Saba' and 'Saba - HS', the most resistant ones to FOC disease, were grouped in a branch, and the 'Sahar - HS' and 'Golden Eye', the most susceptible ones were also grouped in another branch separately. This finding indicates that predominant primers act as markers linked to resistance gene(s) against FOC, which can be used to select onions resistant to FOC disease in any breeding scheme.","PeriodicalId":20164,"journal":{"name":"Physiologia plantarum","volume":"177 1","pages":"e70042"},"PeriodicalIF":5.4,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142953103","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

AsGAD1 cloned from creeping bentgrass modulates cadmium tolerance of Arabidopsis thaliana by remodelling membrane lipids and cadmium uptake, transport and chelation.

IF 5.4 2区生物学

Physiologia plantarum Pub Date : 2025-01-01 DOI: 10.1111/ppl.70063

Yilin Di, Yiqin Cao, Dandan Peng, Ying Liu, Zhou Li

{"title":"AsGAD1 cloned from creeping bentgrass modulates cadmium tolerance of Arabidopsis thaliana by remodelling membrane lipids and cadmium uptake, transport and chelation.","authors":"Yilin Di, Yiqin Cao, Dandan Peng, Ying Liu, Zhou Li","doi":"10.1111/ppl.70063","DOIUrl":"https://doi.org/10.1111/ppl.70063","url":null,"abstract":"The gene GAD1 encodes a glutamate decarboxylase, which is a rate-limiting enzyme for the biosynthesis of endogenous γ-aminobutyrate acid (GABA), but a potential role of GAD1 in regulating cadmium (Cd) tolerance needs to be further elucidated in plants. The objective of this study was to investigate Cd tolerance of creeping bentgrass (Agrostis stolonifera) and transgenic yeast (Saccharomyces cerevisiae) or Arabidopsis thaliana overexpressing AsGAD1. The Cd-tolerant creeping bentgrass cultivar LOFTSL-93 accumulated more endogenous GABA in relation to a significant upregulation of AsGAD1 in leaf and root than the Cd-sensitive W66569 in response to Cd stress. The overexpression of AsGAD1 significantly enhanced Cd tolerance of yeast or A. thaliana associated with improved endogenous GABA content, low oxidative damage, and high cell membrane stability and photochemical efficiency. Compared with wild type, AsGAD1-overexpressing plants or the atgad1 mutant maintained significantly lower or higher Cd content in leaf and root by down-regulating or up-regulating transcript levels of AtNRAMP1/2/3/4/5 and AtZIP1/2, respectively. Moreover, overexpression of AsGAD1 significantly up-regulated transcript levels of AtHMA1/3, contributing to better Cd compartmentalization from chloroplast into cytoplasm and then into vacuoles. AsGAD1 overexpression also induced expressions of AsMT1A/1B/1C/2/3, AsGSH1/2, and AsPCS1/2, indicating better capacity of Cd chelation in cytosol and vacuoles for Cd detoxification. Hence, AsGAD1-regulated detoxification mechanism of Cd could be related to Cd uptake, transport, and chelation. In addition, lipid contents (PC, PG, and DGDG) and the DGDG/MGDG and PC/PG ratios were improved by the AsGAD1 overexpression, which favors membrane stability and functionality under Cd stress. These findings provide new insight into the regulatory role of GAD1 in Cd tolerance in plants.","PeriodicalId":20164,"journal":{"name":"Physiologia plantarum","volume":"177 1","pages":"e70063"},"PeriodicalIF":5.4,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143047545","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Inositol polyphosphates regulate resilient mechanisms in the green alga Chlamydomonas reinhardtii to adapt to extreme nutrient conditions.

IF 5.4 2区生物学

Physiologia plantarum Pub Date : 2025-01-01 DOI: 10.1111/ppl.70089

Rodrigo Bedera-García, María Elena García-Gómez, José María Personat, Inmaculada Couso

{"title":"Inositol polyphosphates regulate resilient mechanisms in the green alga Chlamydomonas reinhardtii to adapt to extreme nutrient conditions.","authors":"Rodrigo Bedera-García, María Elena García-Gómez, José María Personat, Inmaculada Couso","doi":"10.1111/ppl.70089","DOIUrl":"https://doi.org/10.1111/ppl.70089","url":null,"abstract":"In the context of climate changing environments, microalgae can be excellent organisms to understand molecular mechanisms that activate survival strategies under stress. Chlamydomonas reinhardtii signalling mutants are extremely useful to decipher which strategies photosynthetic organisms use to cope with changeable environments. The mutant vip1-1 has an altered profile of pyroinositol polyphosphates (PP-InsPs), which are signalling molecules present in all eukaryotes and have been connected to P signalling in other organisms including plants, but their implications in other nutrient signalling are still under evaluation. In this study, we conducted prolonged starvation in WT and vip1-1 Chlamydomonas cells. After N and P had been consumed, they showed important differences in the levels of chlorophyll, photosystem II (PSII) activity and ultrastructural morphology, including differences in the cell size and cell division. Metabolomic analysis under these conditions revealed an overall decrease in different organic compounds such as amino acids, including arginine and its precursors and tryptophan, which is considered a signalling molecule itself in plants. In addition, we observed significant differences in RNA levels of genes related to N assimilation that are under the control of the NIT2 transcription factor. These data are of important relevance in understanding the signalling role of PP-InsPs in nutrient sensing, especially regarding N, which has not directly been connected to these molecules in green organisms before. Additionally, the PP-InsPs regulation over cell size and photosynthesis supports novel strategies for the generation of resilient strains, expanding the biotechnological applications of green microalgae.","PeriodicalId":20164,"journal":{"name":"Physiologia plantarum","volume":"177 1","pages":"e70089"},"PeriodicalIF":5.4,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143047634","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

BBX22 enhances the accumulation of antioxidants to inhibit DNA damage and promotes DNA repair under high UV-B. BBX22增强抗氧化剂的积累，抑制DNA损伤，促进高UV-B下的DNA修复。

IF 5.4 2区生物学

Physiologia plantarum Pub Date : 2025-01-01 DOI: 10.1111/ppl.70038

Nikhil Job, Shubhi Dwivedi, Maneesh Lingwan, Sourav Datta

{"title":"BBX22 enhances the accumulation of antioxidants to inhibit DNA damage and promotes DNA repair under high UV-B.","authors":"Nikhil Job, Shubhi Dwivedi, Maneesh Lingwan, Sourav Datta","doi":"10.1111/ppl.70038","DOIUrl":"https://doi.org/10.1111/ppl.70038","url":null,"abstract":"Under changing climatic conditions, plant exposure to high-intensity UV-B can be a potential threat to plant health and all plant-derived human requirements, including food. It's crucial to understand how plants respond to high UV-B radiation so that proper measures can be taken to enhance tolerance towards high UV-B stress. We found that BBX22, a B-box protein-coding gene, is strongly induced within one hour of exposure to high-intensity UV-B. Our metabolomics data indicated that BBX22 promotes the accumulation of antioxidants like ascorbic acid and proline. These antioxidants play a vital role in shielding plants exposed to high UV-B from the detrimental effects of Reactive Oxygen Species (ROS), including DNA damage. Additionally, BBX22 promotes DNA damage repair by inducing the expression of DNA repair genes like UVR1 and UVR3. BBX22 directly binds to the promoter of UVR1 to regulate its expression. Furthermore, BBX22 indirectly induces the expression of UVR1 and UVR3 by enhancing the binding of HY5 to their promoters. Together, these results suggest a multi-pronged role of BBX22 in protection against high-intensity UV-B. Enhancing BBX22 levels or its orthologs in different plant species can potentially offer DNA damage protection and tolerance against intense UV radiation.","PeriodicalId":20164,"journal":{"name":"Physiologia plantarum","volume":"177 1","pages":"e70038"},"PeriodicalIF":5.4,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142953091","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Cell size has pervasive effects on the functional composition and morphology of leaves: a case study in Rhododendron (Ericaceae). 细胞大小对叶片的功能组成和形态具有普遍影响：杜鹃花（杜鹃花科）案例研究。

IF 5.4 2区生物学

Physiologia plantarum Pub Date : 2025-01-01 DOI: 10.1111/ppl.70054

Arezoo Dastpak, Monica Williams, Sally Perkins, John A Perkins, Charles Horn, Patrick Thompson, Connor Ryan, Juliana Medeiros, Yi-Dong An, Guo-Feng Jiang, Kevin A Simonin, Adam B Roddy

{"title":"Cell size has pervasive effects on the functional composition and morphology of leaves: a case study in Rhododendron (Ericaceae).","authors":"Arezoo Dastpak, Monica Williams, Sally Perkins, John A Perkins, Charles Horn, Patrick Thompson, Connor Ryan, Juliana Medeiros, Yi-Dong An, Guo-Feng Jiang, Kevin A Simonin, Adam B Roddy","doi":"10.1111/ppl.70054","DOIUrl":"https://doi.org/10.1111/ppl.70054","url":null,"abstract":"The leaf economics spectrum (LES) characterizes a tradeoff between building a leaf for durability versus for energy capture and gas exchange, with allocation to leaf dry mass per projected surface area (LMA) being a key trait underlying this tradeoff. However, regardless of the biomass supporting the leaf, high rates of gas exchange are typically accomplished by small, densely packed stomata on the leaf surface, which is enabled by smaller genome sizes. Here, we investigate how variation in genome size-cell size allometry interacts with variation in biomass allocation (i.e. LMA) to influence the maximum surface conductance to CO2 and the rate of resource turnover as measured by leaf water residence time. We sampled both evergreen and deciduous Rhododendron (Ericaceae) taxa from wild populations and botanical gardens, including naturally occurring putative hybrids and artificially generated hybrids. We measured genome size, anatomical traits related to cell sizes, and morphological traits related to water content and dry mass allocation. Consistent with the LES, higher LMA was associated with slower water residence times, and LMA was strongly associated with leaf thickness. Although anatomical and morphological traits varied orthogonally to each other, cell size had a pervasive impact on leaf functional anatomy: for a given leaf thickness, reducing cell size elevated the leaf surface conductance and shortened the mean water residence time. These analyses clarify how anatomical traits related to genome size-cell size allometry can influence leaf function independently of morphological traits related to leaf longevity and durability.","PeriodicalId":20164,"journal":{"name":"Physiologia plantarum","volume":"177 1","pages":"e70054"},"PeriodicalIF":5.4,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142984370","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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