Phosphatidylglycerol and Chilling Sensitivity in Plants
作者： P. Grattan Roughan
DOI: 10.1104/PP.77.3.740
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摘要: The hypothesis that molecular species of thylakoid phosphatidylglycerol containing two saturated fatty acids (disaturated phosphatidylglycerol) confer chilling sensitivity upon plants was tested by analyzing the acid composition phosphatidylglycerols isolated from leaves a range expected to have different sensitivities temperatures.;Saturated' (palmitate plus stearate hexadeca-trans-3-enoate) as proportion total varied 51 80 mole per cent in analyzed but appeared be rigidly fixed for given plant species, being unaffected leaf maturity or environment.Hexadeca-trans-3-enoate occurred only at sn-2 position, whereas C-18 sn-1 position phosphatidylglycerol. Therefore, disaturated could predicted accurately phosphatidylglycerol.Disaturated accounted <25% chilling-resistant and 50 60% some most chilling-sensitive plants. However, not all contained high proportions phosphatidylglycerol; solanaceous other 16:3-plants C(4) grasses may important exceptions. Nonetheless, increased concomitantly with increasing within genus.
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