Significant relationships among frost tolerance and net photosynthetic rate, water use efficiency and dehydrin accumulation in cold-treated winter oilseed rapes

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• 作者：Milan Old艡ich Urban ; Miroslav Kl铆ma ; Pavel V铆t谩mv谩s ; Jakub Va拧ek ; Alois Albert Hilgert-Delgado ; Vratislav Ku膷era
• 关键词：ABA ; abscisic acid ; AP ; alkaline phosphatase ; BEN ; cultivar Benefit ; CA ; cold acclimation or cold acclimated ; CAL ; cultivar Californium ; Ci ; internal leaf CO2 concentration ; COR ; cultivar Cortes ; COR/LEA ; cold regulated/late embryogenesis abundant ; cvs ; cultivars ; D97 ; D47 ; D45 ; D37 and D35 stand for dehydrin accumulation according to their different molecular masses from protein gel blot analysis (&sim ; 97 ; &sim ; 47 ; &sim ; 45 ; &sim ; 37 and &sim ; 35 kD) ; DHN ; dehydrin ; FT ; frost tolerance ; GS ; stomat
• 刊名：Journal of Plant Physiology
• 出版年：15 December, 2013
• 年：2013
• 卷：170
• 期：18
• 页码：1600-1608
• 全文大小：1359 K

文摘

Five winter oilseed rape cultivars (Benefit, Californium, Cortes, Ladoga, Navajo) were subjected to 30 days of cold treatment (4 掳C) to examine the effect of cold on acquired frost tolerance (FT), dehydrin (DHN) content, and photosynthesis-related parameters. The main aim of this study was to determine whether there are relationships between FT (expressed as LTb>50b> values) and the other parameters measured in the cultivars. While the cultivar Benefit accumulated two types of DHNs (D45 and D35), the other cultivars accumulated three additional DHNs (D97, D47, and D37). The similar-sized DHNs (D45 and D47) were the most abundant; the others exhibited significantly lower accumulations. The highest correlations were detected between LTb>50b> and DHN accumulation (r = 鈭?.815), intrinsic water use efficiency (WUEi; r = 鈭?.643), net photosynthetic rate (r = 鈭?.628), stomatal conductance (r = 0.511), and intracellular/intercellular COb>2b> concentration (r = 0.505). Those cultivars that exhibited higher Pn rate in cold (and further a significant increase in WUEi) had higher levels of DHNs and also higher FT. No significant correlation was observed between LTb>50b> and E, PRI, or NDVI. Overall, we have shown the selected physiological parameters to be able to distinguish different FT cultivars of winter oilseed rape.