Department of Biology, Yale University, P. O. Box 6666, New Haven, Connecticut 06511.
Plant Physiol. 1981 May;67(5):965-8. doi: 10.1104/pp.67.5.965.
The opening of excised Samanea saman pulvini is promoted by prolonged blue or far-red irradiation. Far-red effects are attributed partially but not completely to lowering of the Pfr level. Two hours of continuous or pulsed blue light or pulsed far-red light (total dosage = 2.2 x 10(18) quanta per square centimeter in all cases) also phase shifts the rhythm in Samanea while two hours of continuous blue light phase shifts the rhythm in the related plant Albizzia julibrissin. The same pigments appear to regulate opening and rhythmic phase shifting. The blue light-induced phase response curve has smaller advance and delay peaks and differs in shape from the curve induced by brief red light pulses absorbed by phytochrome. The blue absorbing pigment has not been identified, but it does not appear to be phytochrome acting in a photoreversible mode.
切除的合欢 pulvini 的开口被延长的蓝光或远红光照射所促进。远红光的效果部分归因于 Pfr 水平的降低，但并非完全归因于此。两小时的连续或脉冲蓝光或脉冲远红光（在所有情况下，每平方厘米的总剂量为 2.2×10(18)量子）也会使合欢的节律发生相移，而两小时的连续蓝光则会使相关植物合欢的节律发生相移。同样的色素似乎调节着开放和节律性的相移。蓝光诱导的相移响应曲线的提前和延迟峰值较小，并且与由光敏色素吸收的短暂红光脉冲诱导的曲线形状不同。蓝光吸收色素尚未被鉴定，但它似乎不是以光可逆模式作用的光敏素。
