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Salicylic acid and heat acclimation pretreatment protects Laminaria japonica sporophyte(Phaeophyceae) from heat stress

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Chinese Journal of Oceanology and Limnology 2010年第4期28卷 924-932页

作者：周斌唐学玺王悠 Laboratory of Ecology College of Marine Life SciencesOcean University of China

Possible mediatory roles of heat acclimation and salicylic acid in protecting the sporophyte of marine macroalga Laminaria japonica(Phaeophyceae) from heat stress were *** stress resulted in oxidative injury in the kelp *** heat stress significant accumulation of hydrogen peroxide(H_2O_2) and malonaldehyde(MDA),a membrane lipid peroxidation product,and a drastic decrease in chlorophyll a content were *** of the enzymatic antioxidant system was drastically affected by heat *** activity of superoxide dismutase(SOD) was significantly increased while peroxidase(POD),catalase(CAT) and glutathione peroxidase(GPX) were greatly inhibited and,simultaneously,phenylalanine ammonia-lyase was activated while polyphenol oxidase(PPO) was *** heat acclimation pretreatment and exogenous application of salicylic acid alleviated oxidative damage in kelp *** receiving heat acclimation pretreatment and exogenous salicylic acid prior to heat stress exhibited a reduced increase in H_2O_2 and MDA content,and a lower reduction in chlorophyll a *** with heat acclimation and salicylic acid elevated activities of SOD,POD,CAT,GPX and *** these results collectively,we speculate that the inhibition of antioxidant enzymes is a possible cause of the heat-stress-induced oxidative stress in ***,and enhanced thermotolerance may be associated,at least in part,with the elevated activity of the enzymatic antioxidant system.

关键词： Laminaria japonica salicylic acid heat acclimation thermotolerance oxidative stress antioxidant system

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Two Rubisco Activase Isoforms May Play Different Role in Photosynthetic heat acclimation in Rice Plant

Two Rubisco Activase Isoforms May Play Different Role in Pho...

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中国植物生理学会第十次会员代表大会暨全国学术年会

作者： Dun Wang, Xiaofei Li, Wanjun Yang, Xuping Feng, Dean Jiang* State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou 310058, China

＜正＞Studies in many species have shown that increasing growth temperature gradually or pre-treatment can lead

关键词： Rubisco activase isoforms heat acclimation photosynthetic rate

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Metabolic Changes during acclimation and Hardening to heat and Drought Stress in <i>Zaprionus indianus</i>

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Advances in Entomology 2022年第1期10卷 110-133页

作者： Aditya Moktan Tamang Ravi Parkash Raj Kamal Srivastava Padmasana Singh Department of Zoology Indira Gandhi National Tribal University Amarkantak India Department of Genetics Maharshi Dayanand University Rohtak India

The survival ability of insects can be limited with the changes in the levels of energy metabolites under stressful conditions but only a few studies have considered the plastic effects of heat and related climatic factors relevant to tropical habitats. The objectives of our study were to determine whether adults of Zaprionus indianus are capable of rapid heat hardening (RHH) and rapid desiccation hardening (RDH) and to compare its benefits with heat acclimation (HA) and desiccation acclimation (DA). Adult flies reared under season-specific simulated conditions were subjected to 38°C for RHH and 32°C for HA, while 5% relative humidity (RH) was maintained for RDH and 40% RH for DA. Stress-induced effects of heat and desiccation on the levels of five metabolites namely cuticular lipids (CL), total body lipids (TBL), protein, proline, and carbohydrates were then estimated by biochemical method. Different duration of heat hardening and acclimation led to more accumulation of CL whereas different durations of desiccation hardening and acclimation revealed less accumulation. In contrast, there was an accumulation of carbohydrates and protein under desiccation hardening and acclimation whereas there was the utilization of carbohydrates and protein under heat hardening and acclimation. However, mixed results were observed on the level of proline and TBL under both heat and desiccation stress. These stress-triggered changes in the levels of various metabolites suggest a possible link between heat and desiccation tolerance. Hence, these compensatory changes in the level of various metabolit

关键词： Zaprionus indianus Rapid heat Hardening heat acclimation Rapid Desiccation Hardening Desiccation acclimation

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Methods for improving thermal tolerance in military personnel prior to deployment

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Military Medical Research 2021年第3期8卷 405-423页

作者： Edward Tom Ashworth James David Cotter Andrew Edward Kilding Sports Performance Research Institute New Zealand(SPRINZ) Auckland University of Technology17 Antares PlaceRosedaleAuckland 0632New Zealand School of Physical Education Sport and Exercise SciencesUniversity of OtagoDunedinOtago 9016New Zealand

Acute exposure to heat, such as that experienced by people arriving into a hotter or more humid environment, can compromise physical and cognitive performance as well as health. In military contexts heat stress is exacerbated by the combination of protective clothing, carried loads, and unique activity profiles, making them susceptible to heat illnesses. As the operational environment is dynamic and unpredictable, strategies to minimize the effects of heat should be planned and conducted prior to deployment. This review explores how heat acclimation(HA) prior to deployment may attenuate the effects of heat by initiating physiological and behavioural adaptations to more efficiently and effectively protect thermal homeostasis, thereby improving performance and reducing heat illness risk. HA usually requires access to heat chamber facilities and takes weeks to conduct, which can often make it impractical and infeasible, especially if there are other training requirements and expectations. Recent research in athletic populations has produced protocols that are more feasible and accessible by reducing the time taken to induce adaptations, as well as exploring new methods such as passive HA. These protocols use shorter HA periods or minimise additional training requirements respectively, while still invoking key physiological adaptations, such as lowered core temperature, reduced heart rate and increased sweat rate at a given intensity. For deployments of special units at short notice(heat re-acclimation to maintain an elevated baseline of heat tolerance for long periods in anticipation of such an event. Methods practical for military groups are yet to be fully understood, therefore further investigation into the effectiveness of HA methods is required to establish the most effective and feasible approach to implement them within military groups.

关键词： heat acclimation Thermoregulation heat illness Physiology Human Conditioning Military

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Effects of Temperature acclimation Pretreatment on the Ultrastructure of Mesophyll Cells in Young Grape Plants （Vitis vinifera L. cv. Jingxiu） Under Cross-Temperature Stresses

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Journal of Integrative Plant Biology 2005年第8期47卷 959-970页

作者： Jun-Huan ZHANG Wei-Dong HUANG Yue-Ping LIU Qiu-Hong PAN College of Food Science and Nutritional Engineering China Agricultural University Beijing 100083 China

Leaves from annual young grape plants （Vitis vinifera L. cv. Jingxiu） were used as experimental materials. The ultrastructural characteristics of mesophyll cells in chilling-treated plants after heat acclimation （HA） and in heat-treated plants after cold acclimation （CA） were observed and compared using transmission electron microscopy. The results showed that slight injury appeared in the ultrastructure of mesophyll cells after either HA （38℃ for 10 h） or CA （8℃ for 2.5 d）, but the tolerance to subsequent extreme temperature stress was remarkably improved by HA or CA pretreatment. The increases in membrane permeability and malondialdehyde concentration under chilling （0℃） or heat （45℃） stress were markedly inhibited by HA or CA pretreatment. The mesophyll cells of plants not pretreated with HA were markedly damaged following chilling stress. The chloroplasts appeared irregular in shape, the arrangement of the stroma lamellae was disordered, and no starch granules were present. The cristae of the mitochondria were disrupted and became empty. The nucleus became irregular in shape and the nuclear membrane was digested. In contrast, the mesophyll cells of HA-pretreated plants maintained an intact ultrastructure under chilling stress. The mesophyll cells of control plants were also severely damaged under heat stress. The chloroplast became round in shape, the stroma lamellae became swollen, and the contents of vacuoles formed clumps. In the case of mitochondria of control plants subjected to heat stress, the outer envelope was digested and the cristae were disrupted and became many small vesicles. Compared with cellular organelles in control plants, those in CA plant cells always maintained an integrated state during whole heat stress, except for the chloroplasts, which became round in shape after 10 h heat stress. From these data, we suggest that the stability of mesophyll cells under chilling stress can be increased by HA pretreatment. Similarly, CA pretreatment can p

关键词： chilling stress cold acclimation cross-adaptation grape (Vitis vinifera L. cv. Jingxiu) plants heat acclimation heat stress ultrastructure.

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The molecular basis of heat stress responses in plants

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Molecular Plant 2023年第10期16卷 1612-1634页

作者： Yi Kan Xiao-Rui Mu Jin Gao Hong-Xuan Lin Youshun Lin National Key Laboratory of Plant Molecular Genetics CAS Centre for Excellence in Molecular Plant SciencesShanghai Institute of Plant Physiology and EcologyChinese Academy of SciencesShanghai 200032China Joint Center for Single Cell Biology School of Agriculture and BiologyShanghai Jiao Tong UniversityShanghai 200240China University of the Chinese Academy of Sciences Beijing 100049China Guangdong Laboratory for Lingnan Modern Agriculture Guangzhou 510642China

Global warming impacts crop production and threatens food *** temperatures are sensed by different cell *** increases are classified as either mild warm temperatures or excessively hot temperatures,which are perceived by distinct signaling pathways in *** temperatures induce thermomorphogenesis,while high-temperature stress triggers heat acclimation and has destructive effects on plant growth and *** this review,we systematically summarize the heat-responsive genetic networks in Arabidopsis and crop plants based on recent *** addition,we highlight the strategies used to improve grain yield under heat stress from a source-sink *** also discuss the remaining issues regarding the characteristics of thermosensors and the urgency required to explore the basis of acclimation under multifactorial stress combination.

关键词： global warming thermosensing heat stress thermomorphogenesis heat stress responses heat acclimation

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奥运会运动员竞技表现提升的非训练类策略

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体育 2021年第1期

作者：黎涌明邱俊强徐飞杨贤罡廖开放李博路明月陈小平

伴随东京奥运会和北京冬奥会的临近，寻求训练策略以外的方法，实现精英运动员竞技表现的进一步提升，是科技助力在奥运备战冲刺阶段的重要内容。针对膳食营养优化、物理性恢复、安慰剂效应、热习服和睡眠改善5个领域近10年来的最新研... 详细信息

伴随东京奥运会和北京冬奥会的临近，寻求训练策略以外的方法，实现精英运动员竞技表现的进一步提升，是科技助力在奥运备战冲刺阶段的重要内容。针对膳食营养优化、物理性恢复、安慰剂效应、热习服和睡眠改善5个领域近10年来的最新研究成果进行梳理，从定义、解决问题的迫切性和可行性、作用机制、操作建议等方面对这五种非训练类策略进行了综述。科学应用这些策略能够实现竞技表现不同程度的提升，建议我国奥运备战过程中加大推进这些策略的科学应用。

关键词：奥运备战膳食营养物理性恢复安慰剂效应热习服睡眠 Olympic preparation dietary nutrition physical recovery placebo effect heat acclimation sleep

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