不同光质对皂荚幼苗生长及皂荚刺相关生理指标影响

Effects of different light qualities on seedlings growth and physiological indicators associated with throns of Gleditsia sinensis

为探究培育皂荚壮苗和皂荚刺发育的适宜光源,本研究对实生皂荚幼苗进行不同光质,即红光、蓝光、混合光(7红:3蓝)和白光(对照)处理,测定不同发育时期的皂荚幼苗和皂荚刺的生长和生理指标,选择出利于皂荚刺生长的光环境。结果表明,红光和混合光促进皂荚幼苗地径和皂荚刺形态生长,以及皂荚刺干物质产量、可溶性糖和叶片淀粉含量的积累;而蓝光和混合光则促进皂荚幼苗的高生长,且蓝光有利于皂荚幼苗可溶性糖、淀粉以及皂荚刺黄酮和总酚含量的累积;皂荚幼苗的长刺茎段和无刺茎段的可溶性糖含量在蓝光处理下均显著高于白光处理,分别增高了19.53%和20.86%,皂荚幼苗长刺茎段和无刺茎段的淀粉含量在蓝光和混合光处理下均显著高于白光处理,分别增高51.17%和37.56%、54.84%和34.29%,说明光质处理下皂荚幼苗长刺茎段的可溶性糖含量均高于无刺茎段,而淀粉含量则相反。综上所述,红光和混合光促进皂荚刺形态生长和干物质的积累,蓝光则提高了黄酮和总酚的含量,红光、蓝光和混合光均促进皂荚刺可溶性糖含量的积累。利用隶属函数法进行综合评价,混合光处理的皂荚刺综合评分最好。该研究结果为今后皂荚的选育与栽培提供理论依据和技术指导。

To explore suitable light sources for cultivating strong seedlings and promoting thorn develop-ment of Gleditsia sinensis,the study conducted different light treatments on the seedlings of G.sinensis,including red light,blue light,mixed light(7 red:3 blue),and white light(control).And the growth and phys-iological indicators of seedlings and thorns of G.sinensis at different developmental stages were mea-sured,in order to select a favorable light environment for the growth of thorns.The results indicated that red light and mixed light promoted the stem diameter growth of G.sinensis seedlings and the morphologi-cal growth of G.sinensis thorns,as well as the accumulation of dry matter,soluble sugar content,and leaf starch content in G.sinensis thorns.Under the blue light treatment,the soluble sugar content of both the spine stem segments and spineless stem segments of G.sinensis seedlings significantly increased compared to the white light treatment,by 19.53%and 20.86%respectively.Additionally,the starch content of both the spine and spineless stem segments of G.sinensis seedlings significantly increased under blue light and mixed light treatments compared to the white light treatment,with increments of 51.17%and 37.56%,and 54.84%and 34.29%respectively.This indicated that under light quality treatments,the soluble sugar content of spine stem segments of G.sinensis seedlings was higher than that of spineless stem segments,while the starch content exhibited the opposite trend.In conclusion,red light and mixed light promoted the morphological growth and accumulation of dry matter in G.sinensis thorns.Blue light,on the other hand,increased the content of flavonoids and total phenols.Red light,blue light,and mixed light all stimulated the accumulation of soluble sugar content in G.sinensis.Using the fuzzy comprehensive evaluation method,the mixed light treatment obtained the highest comprehensive score for G.sinensis thorns.These research findings provide theoretical basis and technical guidance for the future breeding and cultivation of G.sinensis.