Journal of Plant Growth Regulation最新文献

{"title":"“Blossoming Beyond Time:” Proline  orchestrates  flower  senescence in Ranunculus asiaticus L. by  modulating  biochemical and  antioxidant  machinery","authors":"Aehsan Ul Haq, Sumira Farooq, Mohammad Lateef Lone, Foziya Altaf, Shazia Parveen, Inayatullah Tahir","doi":"10.1007/s00344-024-11452-2","DOIUrl":"https://doi.org/10.1007/s00344-024-11452-2","url":null,"abstract":"<p>Postharvest senescence presents a formidable obstacle to the economic viability of cut flowers, necessitating meticulous preservation strategies within the cut flower industry. This study meticulously examines the efficacy of exogenously applied proline in enhancing floral longevity in <i>Ranunculus asiaticus</i> cut flowers, while also exploring the underlying physiological and biochemical mechanisms. Floral buds harvested at the half-open stage, were systematically allocated to five clusters for experimentation. The cluster of flowers specified as control was held in distilled water, whereas rest of the clusters received varying concentrations of proline (2 mM, 4 mM, 6 mM and 8 mM). Remarkably, the application of 6 mM proline proved most effective, significantly extending flower lifespan by approximately four days compared to the control. This longevity enhancement correlated with notable increases in floral diameter, soluble proteins, sugars and phenols. The findings indicate a pivotal role of exogenous proline in alleviating oxidative stress within petal tissue, as evidenced by reduced lipoxygenase activity and enhanced antioxidant enzyme activity. Furthermore, a decrease in lipid peroxidation was observed alongside heightened membrane stability, as measured by the membrane stability index. Conclusively, proline treatment emerged as a promising postharvest intervention in enhancing longevity of <i>Ranunculus asiaticus</i> flowers by modulating underlying biochemical mechanisms.</p>","PeriodicalId":16842,"journal":{"name":"Journal of Plant Growth Regulation","volume":"289 1","pages":""},"PeriodicalIF":4.8,"publicationDate":"2024-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142220041","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}

{"title":"Polyamines: New Plant Growth Regulators Promoting Salt Stress Tolerance in Plants","authors":"Hamzeh Amiri, Mohammad Hossein Banakar, Parvaneh Hemmati Hassan Gavyar","doi":"10.1007/s00344-024-11447-z","DOIUrl":"https://doi.org/10.1007/s00344-024-11447-z","url":null,"abstract":"<p>Soil salinization is a major abiotic stress that significantly impairs plant growth and development. This leads to various physiological disorders in plants, ultimately posing a threat to global food security. Polyamines are emerging as new plant growth regulators that can help promote salt stress tolerance in plants. Research has shown that application of polyamines, which are organic compounds containing multiple amine groups, can help alleviate the detrimental effects of salt stress on plants. Increasing the levels of polyamines, either naturally during salt stress or through exogenous application, helps establish homeostasis of polyamines within the plant. This polyamine homeostasis then leads to the homeostasis of reactive oxygen species (ROS) through several physiological processes such as hormonal regulation, ion channel regulation, activation of ROS scavenging enzymes, and antioxidant activity. Collectively, these polyamine-mediated physiological changes help the plant establish ROS homeostasis, which is a key mechanism underlying enhanced salt stress tolerance. The balanced regulation of polyamines and ROS is crucial for plant adaptive responses and survival under saline conditions. Overall, the use of polyamines represents a promising approach for developing more salt-tolerant crops and improving agricultural productivity in saline-affected regions.</p>","PeriodicalId":16842,"journal":{"name":"Journal of Plant Growth Regulation","volume":"40 1","pages":""},"PeriodicalIF":4.8,"publicationDate":"2024-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142220040","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}

{"title":"Modulation of Antioxidant System Under Drought Conditions in Red Kidney Bean by Chitosan","authors":"B. S. Manoj, Moni Gupta, Sachin Gupta, R. K. Salgotra","doi":"10.1007/s00344-024-11459-9","DOIUrl":"https://doi.org/10.1007/s00344-024-11459-9","url":null,"abstract":"<p>The study examines the impact of climate change-induced drought on red kidney bean (<i>Phaseolus vulgaris</i> L.) cv. VL Rajma 63 and evaluates the effectiveness of 0.25% of seed chitosan application priming and foliage spray under restricted irrigation. Specifically, it assesses how chitosan treatment enhances the antioxidant potential in response to varying degrees of drought stress. The protein content of all treated leaves ranged between 12.00 and 41.55 mg/g fresh weight in primed plants. Sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS PAGE) of leaf proteins expounded new polypeptides in the range of 69.8 to 9.9 kDa. The unprimed plants under severe drought stress showed 3.86 folds of higher hydrogen peroxide compared to control on the 70th day after sowing (DAS). The seed primed plant showed the highest superoxide dismutase (SOD) activity of 2.57 ± 0.01 U/mg protein on the 70th DAS with 20% irrigation in VL Rajma 63 (SPV20). The highest polyphenol oxidase (PPO) activity was observed with the treatment SPV20 (2.22 ± 0.01 ∆O.D./min/mg protein) on the 70th DAS. Hydrogen peroxide showed a strong positive correlation between antioxidant enzymes. Native PAGE (12%) assays revealed four, six, and four isoforms of SOD, guaiacol peroxidase (GPOX), and PPO. The isoenzymes Mn-SOD (Rf 0.14), Fe-SOD (Rf 0.24), CuZn-SOD I (Rf 0.36), CuZn-SOD II (Rf 0.46), GPOX 1–4, and PPO 1–4 were upregulated with varying degrees of drought stress. This study significantly extends the role of seed biopriming as a better option than foliage spray for augmenting drought tolerance.</p>","PeriodicalId":16842,"journal":{"name":"Journal of Plant Growth Regulation","volume":"39 1","pages":""},"PeriodicalIF":4.8,"publicationDate":"2024-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142220039","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}

{"title":"An Enhanced Method for Studying Wheat Stomata Physiology","authors":"Ce Guo, Rongrong Tao, Min Zhu, Meixue Zhou, Chenchen Zhao","doi":"10.1007/s00344-024-11441-5","DOIUrl":"https://doi.org/10.1007/s00344-024-11441-5","url":null,"abstract":"<p>High sensitivity and rapid closure of wheat stomata to environmental stimuli make it difficult and inconvenient when investigating stomatal physiology and morphology using epidermal peels. This is due to inevitable mechanical stress to stomatal guard cells when separating epidermis from mesophyll cells, which induced a vast majority of stomatal closure in wheat. Stomata are more open and active in detached leaves than in epidermal peels. Based on these observations, we proposed a simple method, which promotes stomatal opening using detached leaves rather than epidermis for physiological observations. Stomatal response to stimuli was significantly increased when using intact leaf segment. The method was used to investigate stomatal behaviours of two wheat genotypes with contrasting salt tolerance to salinity stress. The effects of salt stress and exogenous abscisic acid (ABA) treatment on stomatal behaviours were also assessed. The salt-tolerant genotype, H-135, demonstrated a greater stomatal closure rate than the salt-sensitive genotype, H-093, in response to exogenous ABA under salt stress, highlighting the potential of stomatal responsiveness as an indicator for breeding salt-resistant crops. This method not only facilitates the effective initiation of stomatal opening but also ensures the continued responsiveness of stomata to subsequent treatments in wheat.</p>","PeriodicalId":16842,"journal":{"name":"Journal of Plant Growth Regulation","volume":"11 1","pages":""},"PeriodicalIF":4.8,"publicationDate":"2024-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142220084","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}

{"title":"Molecular Landscape of Bolting in Spinach Explored Through Gene Expression Profiling","authors":"Marziye Amini, Zahra Hasanpour, Aboozar Soorni, Rahim Mehrabi","doi":"10.1007/s00344-024-11457-x","DOIUrl":"https://doi.org/10.1007/s00344-024-11457-x","url":null,"abstract":"<p>This study aims to investigate the molecular mechanisms governing bolting in spinach (<i>Spinacia oleracea</i>) by analyzing gene expression patterns in key regulatory pathways. Two cultivars, Kashan (early bolting) and Virofly (late-bolting), were analyzed using quantitative real-time polymerase chain reaction (qRT-PCR) at different developmental stages. The photoperiod pathway genes Cryptochrome2 (<i>CRY2</i>) and Flavin-binding kelch repeat F-box protein (<i>FKF1</i>) showed distinct expression dynamics, highlighting their roles in the vegetative-to-reproductive transition. Aging pathway genes Topless (<i>TPL</i>), Squamosa promoter binding protein5 (<i>SPL5</i>), <i>SPL15</i>, and Alpha-ketoglutarate-dependent dioxygenase AlkB-like (<i>AlkB</i>) revealed complex expression patterns, with <i>SPL5</i> and <i>SPL15</i> differing significantly in Virofly. Circadian pathway genes LATE ELONGATED HYPOCOTYL (<i>LHY</i>) and TIMING OF CAB EXPRESSION 1 (<i>TOC1</i>) showed distinct patterns, particularly <i>LHY</i> in Kashan. Autonomous pathway genes LUMINIDEPENDENS (<i>LD</i>) and FLOWERING LOCUS D (<i>FLD</i>) also varied, with <i>LD</i> higher in Kashan at the eight-leaf stage, while <i>FLD</i> was generally elevated. These findings provide insights into the interactions among photoperiod, aging, circadian, and autonomous pathways, suggesting regulatory mechanisms influencing bolting time. Further research into these pathways could enhance spinach breeding for improved yield and quality.</p>","PeriodicalId":16842,"journal":{"name":"Journal of Plant Growth Regulation","volume":"60 1","pages":""},"PeriodicalIF":4.8,"publicationDate":"2024-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142220083","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}

{"title":"Rice Wall-Associated Protein Kinase OsWAK12 Modulates Primary Root and Root Hair Via Involving in Auxin Pathway","authors":"Changqing Du, Xin Hu, Zheng Hu, Cong Chen, Fanqing Duanmu, Yihan Fu, Lili Wang, Quanshi Dong, Hongzheng Sun, Junzhou Li, Quanzhi Zhao","doi":"10.1007/s00344-024-11458-w","DOIUrl":"https://doi.org/10.1007/s00344-024-11458-w","url":null,"abstract":"<p>Wall-associated protein kinases (WAKs), as one subfamily of the receptor-like protein kinases (RLKs) in plants, have been shown to be required for multiple biological processes including cell elongation regulation. However, little information is available about the roles of plant WAKs in root morphogenesis regulation. Here, a rice WAK subfamily member, OsWAK12, was isolated and confirmed to be involved in root morphogenesis regulation. <i>OsWAK12</i> is mainly highly expressed in both young and mature roots in rice. Phenotypic analysis showed that the Cas9-edited mutants of <i>OsWAK12</i> exhibited a shorter primary root, shorter root hair length and less root hair density at seedling stage than wild type Nipponbare. Moreover, <i>OsWAK12</i> overexpression in rice displays reverse phenotypes compared to these results of the Cas9-edited mutants of <i>OsWAK12</i>. Further analysis revealed that <i>OsWAK12</i> expression was significantly induced by the auxin indoleacetic acid (IAA) and the sensitivity of primary root and root hairs to IAA and endogenous IAA content were altered in the Cas9-edited and overexpression mutants of <i>OsWAK12</i>. The sensitivity of the Cas9-edited mutants of <i>OsWAK12</i> to IAA was decreased, contrary to the results of its overexpression mutants. Summarily, these results suggest that OsWAK12 plays important roles in rice root morphogenesis via the auxin pathway.</p>","PeriodicalId":16842,"journal":{"name":"Journal of Plant Growth Regulation","volume":"19 1","pages":""},"PeriodicalIF":4.8,"publicationDate":"2024-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142220082","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}

{"title":"Dual PGPR-AMF Inoculation Offsets Salinity Stress Impact on the Fodder Halophyte Sulla carnosa by Concomitantly Modulating Plant ABA Content and Leaf Antioxidant Response","authors":"Rabaa Hidri, Ouissal Metoui-Ben Mahmoud, Ahmed Debez, Walid Zorrig, Chedly Abdelly, Angel María Zamarreño, José María García-Mina, Rosario Azcon, Ricardo Aroca","doi":"10.1007/s00344-024-11438-0","DOIUrl":"https://doi.org/10.1007/s00344-024-11438-0","url":null,"abstract":"<p>Salt-tolerant microbes are known to mitigate various biotic and abiotic stresses in plants. However, the intimate mechanisms involved, as well as their effects on the production of signaling molecules associated with the host plant–microbe interaction remain largely unknown. The present work aimed to investigate the role and potential uses of arbuscular mycorrhizal fungi (AMF) <i>Rhizophagus intraradices</i> and/or halotolerant plant growth-promoting rhizobacteria (PGPR) <i>Bacillus subtilis</i> in improving plant growth, functional biochemical synthesis and signaling of endogenous abscisic acid during plant response to short- and long-term salt stress in the forage halophyte <i>Sulla carnosa</i>. Plant growth attributes and biochemical traits were determined at 2 different time intervals (45 and 60 d after transplanting time) when salinity was raised from 100 to 200 mM NaCl. <i>S. carnosa</i> showed significant reduction in dry biomass in response to NaCl stress at the second harvest (200 mM NaCl); however inoculating plants with <i>B. subtilis</i> alone or associated with <i>R. intraradices</i> offset salt impact. Leaf electrolyte leakage was significantly increased by salinity but was significantly reduced following dual microbial inoculation. The applied bacterial inoculants also mitigated oxidative stress as reflected by the higher activities of catalase (APX) and superoxide dismutase (SOD) antioxidant enzymes and reduced H₂O₂ level. Inoculation with <i>B. subtilis</i> and <i>R. intraradices</i> upregulated 9-cisepoxycarotenoid dioxygenase 1 (<i>NCED1</i>) and <i>SOD</i> genes expression in <i>S. carnosa</i> plants upon salinity treatment. Furthermore, dual AMF-PGPR -inoculated plants accumulated significantly higher levels of abscisic acid (ABA) in both leaves and roots than non-inoculated and single inoculated plants under salinity stress at both harvest times, thereby accounting for their higher salt tolerance of salt-challenged <i>S. carnosa</i> plants. As a whole, the use of halophytic plants associated with beneficial soil microorganisms could improve the effectiveness of biological methods for saline soil rehabilitation. At the mechanistic level, ABA might represent a key player in the attenuation of salt impact in inoculated plants.</p>","PeriodicalId":16842,"journal":{"name":"Journal of Plant Growth Regulation","volume":"84 1","pages":""},"PeriodicalIF":4.8,"publicationDate":"2024-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142220042","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}

{"title":"Phenolics Signatures in Response to Salinity Stress Provide Novel Insights into Physiological Basis of Salt Tolerance in Mango (Mangifera indica L.)","authors":"Nusrat Perveen, M. R. Dinesh, M. Sankaran, Varalakshmi Lakkireddy, K. S. Shivashankara, R. Venugopal, Hidayatullah Mir","doi":"10.1007/s00344-024-11440-6","DOIUrl":"https://doi.org/10.1007/s00344-024-11440-6","url":null,"abstract":"<p>The effect of salt stress was evaluated on putative mutant seedlings of three polyembryonic mango genotypes viz., Bappakkai, Nekkare, and Kurukkan. Imposition of salinity stress resulted in a decrease in chlorophyll content, relative water content, and gas exchange parameters while enhancing the levels of stress markers like Na⁺/K⁺ ratio, total phenols, and proline. In total, thirteen phenolic acid compounds were identified including eight hydroxybenzoic acids and five hydroxycinnamic acids wherein hydroxybenzoic acid (majorly gallic acid) comprised more than 99% of total phenolic acids. In all the three genotypes, the concentration of protocatechuic acid, 2, 4-Dihydroxy benzoic acid, gallic acid, chlorogenic acid, and t-cinnamic acid increased with increasing level of salt stress indicating their potential role in mango salt tolerance. Bappakkai recorded higher K⁺, highest fold increase in proline content (+ 7.27 fold), highest percent increase in chlorogenic acid (+ 510%), protocatechuic acid (+ 750%), and ferulic acid along with lower Na⁺/K⁺ ratio and lower reduction in the levels of caffeic and sinapic acid at higher level of salt stress suggesting that putative mutants of Bappakkai were better at tolerating salt stress as compared to the other two genotypes. Exogenous application of ferulic acid (FA) to Nekkare putative mutants increased the activity of enzymatic antioxidants, superoxide dismutase (SOD), catalase (CAT), and ascorbate peroxidase (APX). Further, quantitative real-time PCR analysis also revealed higher expression levels of SOD, CAT, and APX in FA-treated Nekkare mutants under salinity stress. The results of this study besides identifying distinct phenolic acid signatures in response to stresses like gamma irradiation and salinity, also confirm the potential of physical mutagenesis in breeding salt-tolerant rootstocks in mango.</p>","PeriodicalId":16842,"journal":{"name":"Journal of Plant Growth Regulation","volume":"29 1","pages":""},"PeriodicalIF":4.8,"publicationDate":"2024-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142220085","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}

{"title":"Supplementation with NPK Prior to Water Restriction Confers Different Biochemical and Growth Modulations in a Native and Exotic Species Present in a Brazilian Semi-arid Region","authors":"Matheus Bessa da Silva, Marcus Vinícius Loss Sperandio","doi":"10.1007/s00344-024-11439-z","DOIUrl":"https://doi.org/10.1007/s00344-024-11439-z","url":null,"abstract":"<p>Drought and altered nutrient dynamics are aggravated by anthropic actions, especially in semiarid environments, such as Brazilian Seasonally Dry Tropical Forests (Caatinga). However, it is not known how nutrient levels affect growth and biochemical responses in plants present in the Caatinga under drought. The aim of this study was to evaluate morphological and biochemical responses in <i>Pavonia varians</i> (native species with medicinal potential) and <i>Megathyrsus maximus</i> (invasive exotic species used in cattle feeding) present in the Caatinga with the application of nitrogen, phosphorus and potassium (NPK) under water restriction and rehydration. The experiment was conducted in a greenhouse with seedlings collected from the Catimbau National Park (Pernambuco, Brazil) in a factorial design with NPK application and water regimes. Plants were harvested after water restriction and after rehydration. NPK application improved the responses of <i>P. varians</i> to water restriction, increasing the leaf dry weight, total N, total K, and proline content. Additionally, MDA and H₂O₂ levels decreased in <i>P. varians</i> under water restriction with NPK application. In contrast, <i>M. maximus</i> without NPK application under water restriction increased SOD and CAT enzyme activities and decreased MDA levels. After rehydration, both species exhibited growth recovery. NPK application in <i>P. varians</i> increased the total K and total soluble carbohydrate contents, while <i>M. maximus</i> increased the number of leaves and root dry weight. Species have different mechanisms for combating drought stress, especially non-enzymatically through proline. Nutritional treatment with pre-stress NPK was an effective alternative against oxidative damage, especially for the native species <i>P. varians</i>.</p>","PeriodicalId":16842,"journal":{"name":"Journal of Plant Growth Regulation","volume":"27 1","pages":""},"PeriodicalIF":4.8,"publicationDate":"2024-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142220086","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}

{"title":"Lower Far-Red Light Levels Improve Tolerance to High Evaporative Demand in Cucumber (Cucumis sativus L.) Seedlings by Increasing Leaf Hydraulic Conductance","authors":"Toshio Shibuya, Sana Kajikawa, Joichiro Kuroda, Ryosuke Endo","doi":"10.1007/s00344-024-11442-4","DOIUrl":"https://doi.org/10.1007/s00344-024-11442-4","url":null,"abstract":"<p>Under light with a low proportion of far-red (FR) light, plants perceive themselves as growing in open places, which may lead them to increase leaf hydraulic conductance (<i>K</i>_leaf) to cope with the higher water demand associated with increased light intensities. We evaluated <i>K</i>_leaf of cucumber (<i>Cucumis sativus</i> L.) seedlings that had been acclimatized to light with different proportions of FR. <i>K</i>_leaf tended to increase with decreasing FR light. <i>K</i>_leaf and leaf vein length density were positively correlated, indicating that increased <i>K</i>_leaf caused by low FR light may have been caused by changes in leaf vein structure. To clarify whether acclimatization to low-FR light can improve tolerance to high evaporative demand, we evaluated changes in stomatal conductance (<i>g</i>_s), quantum yield of photosystem II (Φ_PSII), and leaf water potential (Ψ_leaf) when seedlings that had been acclimatized to light with FR light in the same proportion as sunlight (FR+) or light without FR light (FR−) were transferred to a high vapor-pressure deficit (<i>VPD</i>) condition. After transfer to high <i>VPD</i>, <i>g</i>_s and Ψ_leaf of the seedlings decreased in all treatment groups, but the decrease was smaller in the FR− seedlings. After transfer to high <i>VPD</i>, Φ_PSII decreased significantly in the FR+ seedlings, but not in the FR− seedlings. These findings suggest that the changes in stress tolerance induced by FR light may be partly mediated by changes in <i>K</i>_leaf. Our results also indicate a potential new technique for mitigating drought stress in horticultural crops by controlling FR light.</p>","PeriodicalId":16842,"journal":{"name":"Journal of Plant Growth Regulation","volume":"5 1","pages":""},"PeriodicalIF":4.8,"publicationDate":"2024-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142220087","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}