|Table of Contents|

Effects of High Temperature and Drought Stress on PSII Function and Light Distribution in Peony Leaves With Different Resistance

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2019年11
Page:
72-79
Research Field:
Publishing date:

Info

Title:
Effects of High Temperature and Drought Stress on PSII Function and Light Distribution in Peony Leaves With Different Resistance
Author(s):
LIU Junjuan
(Communication Engineering,Henan Light Industry Career Academy Department,Zhengzhou,Henan 450000)
Keywords:
Paeonia suffruticosa; high temperature and drought stress; PSII function; light distribution
PACS:
-
DOI:
10.11937/bfyy.20184261
Abstract:
Two peony cultivars ‘Huhong’(drought-toleran) and ‘Luoyanghong’(drought susceptible) with different resistance were used to study the PSII function and light distribution characteristics of peony leaves under high temperature and drought stress in order to provide theoretical basis and practical support for improving peony resistance to drought.The results showed that high temperature and drought stress caused increase of PSII initial fluorescence (F0),light-induced leaf initial fluorescence (F0′),non-photochemical quenching coefficient (qN),antenna thermal dissipation percentage (Hd),non-photochemical dissipation percentage (Ex) and decrease of maximum fluorescence (Fm),variable fluorescence (Fv),dark adaptation maximum photochemistry efficiency (Fv/Fm),PSII actual light energy conversion efficiency (Fv′/Fm′),chlorophyll fluorescence photochemistry quenching coefficient (qP),apparent photosynthetic electron transfer rate (ETR).Four days before stress,the two peony had a certain photosynthetic protection mechanism.There were no significant differences in the distribution of chlorophyll fluorescence energy of PSII between two peony cultivars and control.Functions of PSII were not affected.However,after 6 days,photosynthetic protection mechanism was severely damaged,chlorophyll fluorescence energy distribution changed significantly.On the 12th day when Hd increased gradually,‘Huhong’ and ‘Luoyanghong’ increased 118.9% and 153.0% respectively compared with the control.Pc and ETR decreased gradually.On the 12th day,Pc,and ETR of ‘Huhong’ decreased by 70.7%,73.8%.And those of ‘Luoyanghong’ were 84.9% and 97.2% respectively.Thus it could be seen energy entering PSII reaction center decreased,energy dissipation through antenna increased,and PSII function was inhibited.There were significant differences in chlorophyll fluorescence energy distribution between two peony cultivars in the middle and late stages of stress.The percentage of Hd and Ex in ‘Luoyanghong’ cultivars with weak resistance was higher than that in ‘Huhong’ cultivars with strong resistance.The increase of Ex could cause more serious reversible inactivation or even destruction of photosynthetic apparatus.The results showed that ‘Huhong’ with stronger resistance had lower inhibition degree than ‘Luoyang hong’ with weaker resistance under high temperature and drought stress,and could still maintain relatively high PSII actual light energy conversion efficiency.

References:

[1]王莹博,许申平,马杰,等.高温干旱胁迫对白及光合特性及叶绿素荧光参数的影响[J].河南农业大学学报,2018,52(2):199-205.[2]SALVUCCIM E,CRAFTS-RANDNER S J.Inhibition of photosynthesis by heat stress:The activation state of Rubisco as a limiting factor in photosynthesis[J].Physiologia Plantarum,2004,120(2):179-186.[3]云建英,杨甲定,赵哈林.干旱和高温对植物光合作用的影响机制研究进展[J].西北植物学报,2006,26(3):641-648.[4]王莹博,许申平,马杰,等.高温干旱胁迫对白及光合特性及叶绿素荧光参数的影响[J].河南农业大学学报,2018,52(2):199-205.[5]张燕红,吴永波,刘璇,等.高温干旱胁迫对杨树幼苗光合性能和抗氧化酶系统的影响[J].东北林业大学学报,2017,45(11):33-38.[6]胡文海,胡雪华,邹桂花,等.高温干旱对2个辣椒品种PSⅡ功能与光能分配的影响[J].江西农业大学学报,2010,32(4):695-699.[7]彭民贵,张继,陈学林,等.聚乙二醇模拟干旱胁迫下紫斑牡丹的抗旱性研究[J].西北农林科技大学学报(自然科学版),2014,42(4):179-186.[8]DEMMING-ADAMS B,ADMS W W,BARKER D H,et al.Using chlorophyll fluorescence to assess the fraction of absorbed light allocated to thermal dissipation of excess excitation[J].Physiologia Plantarum,1996,98(2):253-264.[9]周艳虹,黄黎锋,喻景权.持续低温弱光对黄瓜叶片气体交换,叶绿素荧光猝灭和吸收光能分配的影响[J].植物生理与分子生物学学报,2004,30(2):153-160.[10]GENTY B E,BRIANTAIS J M,BAKER N R.The relationship between the quantum yield of photosynthetic electron transport and quenching of chlorophyll fluorescence[J].Biochim Biophys Acta,1989,990:87-92.[11]王丽媛,张玉,王世标,等.三江平原湿地小叶章叶片荧光特性对水分梯度的响应[J].草业科学,2019,36(1):132-141.[12]孙永江,王金欢,耿庆伟,等.不同浓度臭氧处理对‘赤霞珠’葡萄叶片光系统II功能的影响[J].植物生理学报,2015(11):1947-1954.[13]MAIKIN S,FORK D C.Photosynthetic unit of sun and shade plants[J].Plant Physiol,1981,67:580-583.[14]LIN R C,XU C C,LI L B.Xanthophyll cycle and its molecular mechanism in photop rotection[J].Acta Bot Sin,2002,44:379-383.[15]张其德,朱新广,卢从明,等.盐胁迫下CO2浓度倍增对冬小麦叶绿体光能吸收和激发能分配的影响[J].生物物理学报,1998(14):537-542.[16]李涛,姜闯道.密植对薄荷叶片光系统II功能的影响[J].植物生理学报,2017,53(7):1279-1286.[17]DEMMING-ADAMSB,ADAMS W W.Photop rotection and other responses of plants to high light stress[J].Ann Rev Plant Physiol Plant Mol Biol,1992,43:599-626.[18]胡文海,肖宜安,喻景权,等.低夜温后不同光强对榕树叶片PSII功能和光能分配的影响[J].植物研究,2005,25(4):159-162.

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Last Update: 2019-07-09