Please wait a minute...
浙江大学学报（农业与生命科学版）
  2012, Vol. 38 Issue (1): 1-9    DOI: 10.3785/j.issn.1008-9209.2012.01.001
Biological sciences & biotechnology     
Identification and physiological characterization of thermotolerant rice genotypes
ZHOU Wei‐hui１ , XUE Da‐wei２ , ZHANG Guo‐ping１
1 . College o f A griculture and Biotechnology , Zhe j iang
University , H angz hou 310058 , China ; 2 . College o f L i f e and Env ironment Sciences , H angz hou Normal
University , H angz hou 310036 , China
Download: HTML ( )    PDF(937KB)
Export: BibTeX | EndNote (RIS)      

Abstract  The experiments were conducted to identify thermo‐tolerant rice genotypes and characterize physiological traits relevant to heat stress tolerance . Seventy‐two rice genotypes were exposed to high temperature (４０ ℃ /３５ ℃ , １４ h/１０ h) for １２ d at heading stage , and floret fertility was examined . The similar results were obtained in the two years?experiments that there was a distinctly genotypic difference in floret fertility as affected by heat stress . When rice seedlings were exposed to heat stress , chlorophyll content (SPAD value) , plant height , root length , shoot and root biomass were dramatically reduced , with thermo‐tolerant genotypes being relatively less affected than sensitive ones . Meanwhile ,high temperature enhanced membrane lipid peroxidation , as expressed by malondialdehyde content and increased superoxide dismutase (SOD) activity . Thermo‐tolerant genotypes had less and more increase in MDA content and SOD activity than sensitive ones under heat stress relative to the control , respectively .Accordingly the thermo‐tolerant genotypes were identified , with genotypes CJ６ , MY４６ and JX１７ being highly thermo‐tolerant , MH６３ , Kasalath and IRAT４２１７ being very sensitive .

Published: 20 January 2012
Service
E-mail this article
Add to my bookshelf
Add to citation manager
E-mail Alert
RSS
Articles by authors
ZHOU Weihui
XUE Dawei
ZHANG Guoping
Cite this article:

ZHOU Weihui,XUE Dawei,ZHANG Guoping. Identification and physiological characterization of thermotolerant rice genotypes. , 2012, 38(1): 1-9.

URL:

http://www.zjujournals.com/agr/10.3785/j.issn.1008-9209.2012.01.001     OR     http://www.zjujournals.com/agr/Y2012/V38/I1/1


耐热水稻基因型的鉴定及相关生理学特征分析(英文)

　对来自不同国家和地区的７２ 个水稻品种在抽穗扬花期进行高温处理(４０ ℃ /３５ ℃ , １４ h/１０ h ,１２ d) ,记录结实率,分析和耐热相关的生理学特征,并鉴定耐热水稻的基因型.２ 年的试验结果表明:高温对结实率有严重的伤害,且基因型间存在明显的差异;苗期高温处理显著降低了叶绿素含量(SPAD值) 、株高、根长和生物量,且对敏感基因型的影响较耐热基因型大;同时,高温胁迫导致膜脂过氧化,表现为丙二醛含量增加和超氧化物歧化酶活性增强;与敏感基因型相比,耐热基因型的丙二醛含量增加较少,而超氧化物歧化酶活性增加较多;根据试验结果,春江０６ 、密阳４６ 和京系１７ 为高耐热基因型,明恢63 、Kasalath 和IRAT４２１７ 为高热敏感基因型.
No related articles found!