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研究了光温逆境对扬麦 １５８ 旗叶 Ｐ Ｓ Ｉ颗粒光化学特性和多肽组分的影响．电子传递活性的结果表明：光温逆境（２５００ μｍ ｏｌ／ｍ ２ｓ，３７℃）条件下，扬麦 １５８ Ｐ Ｓ Ｉ颗粒还原能力产生明显下降； Ｐ Ｓ Ｉ颗粒多肽组分中，受体端１９０００、 Ｌ Ｃ Ｈ Ｉ及作用中心的部分小分子多肽对光温逆境反应较为敏感，降解最为显著．光温逆境条件下 Ｌ Ｈ Ｃ Ｉ在维持 Ｐ Ｓ Ｉ作用中心稳定等过程中起调节作用
The effects of light and temperature on the photochemical properties and polypeptide components of P S I in the flag leaf of Yangmai 158 were studied. The result of electron transfer activity showed that the reducing ability of Yangmai 158 P S I particles decreased obviously under light and temperature stress conditions (2500 μmol / m 2 s, 37 ℃). Among the peptide components of P S I, the receptor end 19000 , L C H I and part of the role of the center of small peptides on the light and temperature stress reaction is more sensitive to the most significant degradation. L H C I plays a regulatory role in the maintenance of P S I center of action under light and temperature stress conditions