Hydrogen sulfide and ethylene regulate photosynthesis, sugar metabolism, and tolerance to heat stress in the presence of sulfur in rice.

IF 5.4 2区 生物学 Q1 PLANT SCIENCES
Ameena Fatima Alvi, Sheen Khan, Nafees A Khan
{"title":"Hydrogen sulfide and ethylene regulate photosynthesis, sugar metabolism, and tolerance to heat stress in the presence of sulfur in rice.","authors":"Ameena Fatima Alvi, Sheen Khan, Nafees A Khan","doi":"10.1111/ppl.70013","DOIUrl":null,"url":null,"abstract":"<p><p>Heat stress impacts photosynthesis and carbohydrate metabolism, challenging food security. To comprehend the mechanisms of thermotolerance, we examined the role of ethylene (ET) and hydrogen sulfide (H<sub>2</sub>S) with or without sulfur (S) in rice (Oryza sativa L.). Both ET and H<sub>2</sub>S promoted heat stress tolerance more conspicuously in the presence of S, restoring the balance between carbon assimilation and utilization. The enhanced photosynthesis in ET and H<sub>2</sub>S-treated plants under heat stress was linked with increased relative expression of Rubisco subunits rbcS and rbcL and carbohydrate metabolizing, including Sucrose Synthase 2 (SuSy2) and Sucrose transport 1 (SUT1). Notably, the H<sub>2</sub>S application showed the highest increase of 2.3, 3.2, 3.0, and 2.4-fold expression of the rbcS, rbcL, SuSy2, and SUT1, respectively, compared to the heat stress alone. The application of H<sub>2</sub>S with S more prominently increased starch content, total soluble sugar, and soluble invertase activity by 59.3%, 35.7%, and 25.9%, and also activity of soluble starch synthase and granule-bound starch synthase by 47.2% and 32.8%, respectively, compared to heat-stressed plants. The treatment (H<sub>2</sub>S plus S) elevated cysteine and GSH content and the activity of the antioxidant enzymes to maintain cellular redox potential under heat stress. These observed tolerance responses were less pronounced in plants treated with hypotaurine (HT; H<sub>2</sub>S scavenger) than those treated with norbornadiene (NBD; ET inhibitor), underscoring the superior role of H<sub>2</sub>S over ET in mitigating heat stress. The present study's findings explain that H<sub>2</sub>S is crucial for the ET-mediated response in augmenting photosynthesis and heat stress tolerance in rice.</p>","PeriodicalId":20164,"journal":{"name":"Physiologia plantarum","volume":"176 6","pages":"e70013"},"PeriodicalIF":5.4000,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Physiologia plantarum","FirstCategoryId":"99","ListUrlMain":"https://doi.org/10.1111/ppl.70013","RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"PLANT SCIENCES","Score":null,"Total":0}
引用次数: 0

Abstract

Heat stress impacts photosynthesis and carbohydrate metabolism, challenging food security. To comprehend the mechanisms of thermotolerance, we examined the role of ethylene (ET) and hydrogen sulfide (H2S) with or without sulfur (S) in rice (Oryza sativa L.). Both ET and H2S promoted heat stress tolerance more conspicuously in the presence of S, restoring the balance between carbon assimilation and utilization. The enhanced photosynthesis in ET and H2S-treated plants under heat stress was linked with increased relative expression of Rubisco subunits rbcS and rbcL and carbohydrate metabolizing, including Sucrose Synthase 2 (SuSy2) and Sucrose transport 1 (SUT1). Notably, the H2S application showed the highest increase of 2.3, 3.2, 3.0, and 2.4-fold expression of the rbcS, rbcL, SuSy2, and SUT1, respectively, compared to the heat stress alone. The application of H2S with S more prominently increased starch content, total soluble sugar, and soluble invertase activity by 59.3%, 35.7%, and 25.9%, and also activity of soluble starch synthase and granule-bound starch synthase by 47.2% and 32.8%, respectively, compared to heat-stressed plants. The treatment (H2S plus S) elevated cysteine and GSH content and the activity of the antioxidant enzymes to maintain cellular redox potential under heat stress. These observed tolerance responses were less pronounced in plants treated with hypotaurine (HT; H2S scavenger) than those treated with norbornadiene (NBD; ET inhibitor), underscoring the superior role of H2S over ET in mitigating heat stress. The present study's findings explain that H2S is crucial for the ET-mediated response in augmenting photosynthesis and heat stress tolerance in rice.

硫化氢和乙烯调节水稻在含硫条件下的光合作用、糖代谢和耐热性。
热应激影响光合作用和碳水化合物代谢,对粮食安全构成挑战。为了了解水稻耐热性的机制,我们研究了乙烯(ET)和硫化氢(H2S)(含硫或不含硫)在水稻(Oryza sativa L.)中的作用。在S存在的情况下,ET和H2S都能更显著地促进热胁迫耐受性,恢复碳同化和利用之间的平衡。高温胁迫下,经ET和h2s处理的植株光合作用增强与Rubisco亚基rbc和rbcL相对表达增加以及糖代谢(蔗糖合成酶2 (SuSy2)和蔗糖转运1 (SUT1))增加有关。值得注意的是,与单独热应激相比,H2S处理的红细胞、rbcL、SuSy2和SUT1的表达量分别增加了2.3倍、3.2倍、3.0倍和2.4倍。与热胁迫相比,H2S加S处理显著提高了植株淀粉含量、可溶性总糖含量和可溶性转化酶活性,分别提高了59.3%、35.7%和25.9%,可溶性淀粉合成酶和颗粒结合淀粉合成酶活性分别提高了47.2%和32.8%。H2S + S处理提高了半胱氨酸和谷胱甘肽含量以及抗氧化酶的活性,以维持热应激下细胞的氧化还原电位。这些观察到的耐受性反应在经次牛磺酸(HT)处理的植物中不那么明显;H2S清除剂)比降冰片二烯(NBD;ET抑制剂),强调H2S在缓解热应激方面的作用优于ET。本研究的发现解释了H2S对et介导的水稻光合作用和耐热性的增强至关重要。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 求助全文
来源期刊
Physiologia plantarum
Physiologia plantarum 生物-植物科学
CiteScore
11.00
自引率
3.10%
发文量
224
审稿时长
3.9 months
期刊介绍: Physiologia Plantarum is an international journal committed to publishing the best full-length original research papers that advance our understanding of primary mechanisms of plant development, growth and productivity as well as plant interactions with the biotic and abiotic environment. All organisational levels of experimental plant biology – from molecular and cell biology, biochemistry and biophysics to ecophysiology and global change biology – fall within the scope of the journal. The content is distributed between 5 main subject areas supervised by Subject Editors specialised in the respective domain: (1) biochemistry and metabolism, (2) ecophysiology, stress and adaptation, (3) uptake, transport and assimilation, (4) development, growth and differentiation, (5) photobiology and photosynthesis.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信