不同光质补光对火龙果茎生理特性及开花结果的影响

Subjects: Biology >> Botany >> Applied botany submitted time 2021-04-13 Cooperative journals: 《广西植物》

谢佐沐 蔡英健 余若莹 俞超 汪财生 付美 郭斌

Abstract： To investigate the effects of different supplemental light on physiological characteristics of pitaya stems, red, white and blue light were used as supplemental light source at night. The contents of soluble sugar, soluble protein, chlorophyll, mitochondrial protein, mitochondrial membrane potential and three endogenous hormones (CTK, IAA, GA) were determined. The indicators of stem growth, flowering, fruit yield were counted. The results were as follows: Supplementing this three kinds of light could all increase the soluble protein content in pitaya stems, and the white light had the best effect; Supplementing this three kinds of light could all significantly increase soluble sugar content in pitaya stems, and the blue light had the best effect; Supplementing white light was beneficial to increase the content of chlorophyll a and b, and supplementing red light had no significant effect on it, while blue light would reduce its content; Supplementing white light and blue light could significantly reduce the CTK content, supplementing white and red light could significantly increase the IAA content, and supplementing red light and blue light could significantly increase the GA content; Supplementing white light could significantly reduce the mitochondrial protein content and the three kinds of supplement light had no obvious effect on the mitochondrial membrane potential; Supplementing the three kinds of light had no significant effect on the growth of pitaya stems, while supplementing red and white light could significantly increase the flower formation rate, and supplementing red light could significantly increase the fruit yield. Comprehensive analysis deemed that supplementing red light and white light had obvious promoting effect on the contents of metabolites, chlorophyll, endogenous hormones of pitaya stems, flower formation rate and fruit yield. The research results could provide a reference for a technology of light quality controlling to improve the growth and development pitaya plants.

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