Full TGIF Record # 237791
Item 1 of 1
DOI:10.11686/cyxb20130527
Web URL(s):http://caod.oriprobe.com/articles/39735111/Effects_of_drought_preconditioning_on_physiological_responses_to_heat_.htm
    Last checked: 02/10/16
    Access conditions: Item is within a limited-access website
    Notes: Abstract only
http://en.cnki.com.cn/Article_en/CJFDTOTAL-CYXB201305031.htm
    Last checked: 02/23/2018
    Notes: Item is an abstract
Publication Type:
i
Report
Author(s):Peng, Yan; Li, Zhou
Author Affiliation:College of Animal Science and Technology, Sichuan Agricultural University, Ya'an, China
Title:Effects of drought preconditioning on physiological responses to heat stress in two Kentucky bluegrasses
Source:[Caoye Xuebao] [Acta Prataculturae Sinica]. Vol. 22, No. 5, October 20 2013, p. 229-238.
# of Pages:10
Publishing Information:[Lanzhou Shi, China]: ["Cao Ye Xue Bao" Bian Ji Wei Yuan Hui]
Abstract/Contents:"The effect of improved heat tolerance through drought preconditioning on responses to drought preconditioning under heat stress was studied in two Kentucky bluegrasses. Plants of Kentucky bluegrass (Poa pratensis) cultivars 'Midnight' (drought resistant) and 'Brilliant' (drought sensitive) were well watered (non-preconditioned control) or exposed to two cycles of drought stress without irrigation (drought preconditioning) and then exposed to heat stress (35°C/30°C, day/night) for 25 days in growth chambers. Turf quality and other physiological parameters in leaves were determined at 0 (end of drought preconditioning and beginning of heat treatment), 5, 10, 15, 20, and 25 days of heat treatment. During the period of heat stress, drought-preconditioning of cv. 'Brilliant' resulted in significantly (P<0.05) higher turf quality compared with the non-preconditioned 'Brilliant'. After 5 days of heat stress, osmotic potential gradually declined in drought-preconditioned 'Brilliant', but there was little change in the non-preconditioned 'Brilliant'. Plants of drought-preconditioned 'Brilliant' maintained significantly (P<0.05) higher relative water content that those of non-preconditioned plants at 10 and 15 days of heat stress. The activities of superoxide dismutase and catalase were 10 and 20 days of heat stress, but electrolyte leakage was the reverse. There was significantly (P<0.05) higher fatty acid (16:0 and 18:0) content in drought-preconditioned 'Brilliant' than in non-preconditioned 'Brilliant' after 15 days of heat stress, although the content of 18:3 was the opposite. Drought-preconditioned 'Midnight' had a higher double bond index (DBI) than non-preconditioned 'Brilliant'. The physiological parameters were not significantly different in the two treatments in 'Midnight' under heat stress. In conclusion, drought preconditioning improved heat tolerance in the drought sensitive cv. 'Brilliant' but failed to improve heat tolerance in the drought resistant cv. 'Midnight'. Improved heat tolerance through drought preconditioning in 'Brilliant' was associated with increased osmoregulatory ability and the promotion of antioxidant activities which can protect unsaturated fatty acids from damage. These changes may play an important role in improving leaf relative water content, protecting membrane systems and delaying leaf senescence."
Language:Chinese
References:39
Note:Abstract also appears in English
"Sum No. 106"
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ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Peng, Y., and Z. Li. 2013. Effects of drought preconditioning on physiological responses to heat stress in two Kentucky bluegrasses. (In Chinese) [Caoye Xuebao] [Acta Prataculturae Sinica]. 22(5):p. 229-238.
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DOI: 10.11686/cyxb20130527
Web URL(s):
http://caod.oriprobe.com/articles/39735111/Effects_of_drought_preconditioning_on_physiological_responses_to_heat_.htm
    Last checked: 02/10/16
    Access conditions: Item is within a limited-access website
    Notes: Abstract only
http://en.cnki.com.cn/Article_en/CJFDTOTAL-CYXB201305031.htm
    Last checked: 02/23/2018
    Notes: Item is an abstract
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