在黑暗条件下对全缘马尾藻（Sargassum integerrimum）幼孢子分别进行0.5、1、2、4 h干出处理，研究干出处理对幼孢子体生长、幼孢子体体内叶绿素 a、叶绿素 c、类胡萝卜素、脯氨酸以及可溶性糖含量的影响。结果表明：相比于未进行干出处理的对照组，0.5 h、1 h组的短暂干出可促进幼孢子体生长（P＜0.05），幼孢子体体内两种叶绿素、类胡萝卜素、脯氨酸以及可溶性糖含量差异均无统计学意义（P＞0.05）；2 h、4 h组的长时间干出可抑制幼孢子体生长（P＜0.05），幼孢子体体内两种叶绿素含量均降低（P＜0.05），类胡萝卜素、脯氨酸以及可溶性糖的含量升高（P＜0.05）并保持较高水平。在人工育苗过程中每天在黑暗条件下对幼孢子体进行短时间（0.5～1 h）干出处理，可促进幼孢子体生长，并适当提高其抗逆性以及对干旱的适应性。%The effect ofdifferenttime (0.5 h, 1 h, 2 h, 4 h) desiccation in darknesson changes of germlinggrowth and content of chlorophyll a, chlorophyll c, carotenoid, proline and soluble saccharides ingermlings ofSargassum integerrimumwere investigated.Compared with control group without desiccation, resultsshow thatthe germlings growth of0.5 hdesiccation group and1.0 hdesiccationgroup wereaccelerated (P<0.05) and the content oftwo kinds of chlorophyll, carotenoid, proline and soluble saccharides in germlings of each group had no significant change(P>0.05). Meanwhile,resultsshow that the germlings growthof2 hdesiccation group and4h desiccation groupwereinhibited (P<0.05), two kinds of chlorophyll content in germlings of each group decreased significantly (P<0.05), the contentof carotenoid, proline andsoluble saccharides in germlingsof each group increasedsignificant (P<0.05)andit remainedat high level. Study suggests that 0.5 to 1h of continuous desiccation in darknesson the germlings ofS. integerrimum during seedling process on a daily basis has the effect of accelerating the growth of germlings. This treatment can also improve the stress resistance and adaptability to drought stress of germlings.
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