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题名: Effects of acclimation and pretreatment with abscisic acid or salicylic acid on tolerance of Trigonobalanus doichangensis to extreme temperatures
作者: Zheng, Y. L.1; Li, W. Q.2; Sun, W. B.3
刊名: BIOLOGIA PLANTARUM
出版日期: 2015-06-01
卷号: 59, 期号:2, 页码:382-388
关键词: cold stress ; heat stress ; plant hormones ; semilethal temperature
DOI: 10.1007/s10535-015-0488-z
文章类型: Article
英文摘要: The effects of acclimation to cold (4 A degrees C) and heat (36/38/40 A degrees C) on corresponding freezing and heat tolerances of one-year-old Trigonobalanus doichangensis seedlings were studied. In addition, the effects of abscisic acid (ABA) and salicylic acid (SA) pretreatments on the tolerance of this species to temperature extremes were tested. The results show that the content of soluble sugars increased with the duration of acclimation to cold (4 A degrees C), and the relative electrical conductivity and malondialdehyde content increased significantly after 7 d; however, the content of proline did not vary significantly. After acclimation to cold for 3 and 7 d, the semilethal low temperature (LLT50) was 0.8 and 1.1 A degrees C lower, respectively, compared with that of the control. The maximum quantum yield of photosystem II (measured as variable to maximum fluorescence ratio, F-v/F-m) decreased significantly after freezing treatments (-4 to -8 A degrees C), however, less when the plants were pretreated with 1-100 mg dm(-3) ABA. Acclimation to heat did not increase the semilethal high temperature (LHT50). A low concentration (1 mg dm(-3)) of SA increased LHT50, but medium and high concentrations (10 and 100 mg dm(-3)) decreased it. F-v/F-m decreased significantly after a heat shock (45-54 A degrees C). The pretreatment with 1-50 mg dm(-3) SA ameliorated a subsequent heat (48 A degrees C) stress.
类目[WOS]: Plant Sciences
研究领域[WOS]: Plant Sciences
关键词[WOS]: PLANT COLD-ACCLIMATION ; ABIOTIC STRESS TOLERANCE ; CHLOROPHYLL FLUORESCENCE ; FREEZING TOLERANCE ; OXIDATIVE STRESS ; GENE-EXPRESSION ; HEAT TOLERANCE ; ARABIDOPSIS ; METABOLISM ; PROLINE
收录类别: SCI
语种: 英语
WOS记录号: WOS:000353889400022
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.kib.ac.cn/handle/151853/20681
Appears in Collections:中国西南野生生物种质资源库_期刊论文

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作者单位: 1.Southwest Forestry Univ, State Forestry Adm, Key Lab Biodivers Conservat Southwest China, Kunming 650224, Peoples R China
2.Chinese Acad Sci, Kunming Inst Bot, Germplasm Bank Wild Species, Kunming 650201, Peoples R China
3.Chinese Acad Sci, Kunming Inst Bot, Kunming Bot Garden, Kunming 650204, Peoples R China
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