不同光质对辣椒叶色黄化突变体光合生理特性的影响研究  

Photosynthetic Characteristics and Physicochemical Properties of Pepper Leaf Yellowing Mutants under Different Light Quality

作　　者：戴云花 刘周斌 杨莎 毛莲珍 邹学校 欧立军 DAI Yunhua;LIU Zhoubin;YANG Sha;MAO Lianzhen;ZOU Xuexiao;OU Lijun(Engineering Research Center for Germplasm Innovation and New Variety Breeding of Horticultural Crops,Ministry of Education,Hunan Key Laboratory of Vegetable Biology,College of Horticulture,Hunan Agricultural University,Changsha 410128,China)

机构地区：[1]湖南农业大学园艺学院,园艺作物种质创新与新品种选育教育部工程研究中心,蔬菜生物学湖南重点实验室,长沙410128

出　　处：《西北植物学报》2023年第4期601-610,共10页Acta Botanica Boreali-Occidentalia Sinica

基　　金：财政部和农业农村部国家现代农业产业技术体系(CARS-24-A05);国家自然科学基金面上项目(32072672)。

摘　　要：以辣椒叶色黄化突变体yl1及其野生型6421为试材,用白光、蓝光、红光、绿光、紫光、黄光和远红光不同光质进行处理,考察其表型、生理及光合特性的变化特征,探究光质对黄叶辣椒植株生长发育的影响。结果显示:(1)蓝光与红光对辣椒幼苗的生长有促进作用,黄光和远红光则会显著抑制幼苗生长,6421生长受不同光质的抑制影响比yl1更大。(2)两个辣椒材料光合色素含量在不同光质下均不同程度降低;6421叶绿素总含量和类胡萝卜素含量在不同光质下均高于yl1,yl1和6421叶片的光合色素含量分别在紫光和黄光下最低。(3)蓝光和绿光能显著提高yl1的净光合速率(P_(n)),而不同光质处理均显著降低了6421的P_(n)。(4)紫光处理使yl1的PSⅡ潜在活性(F_(v)/F_(o))和最大光化学效率(F_(v)/F_(m))值均显著降低且显著低于6421,但升高了光化学猝灭系数(qP)和非光化学猝灭系数(NPQ)。(5)蓝光、红光和绿光均能提高辣椒的超氧化物歧化酶(SOD)、过氧化物酶(POD)和过氧化氢酶(CAT)活性,而黄光处理的作用则相反。研究发现,蓝光和红光对辣椒的生长发育具有促进作用,而黄光和远红光具有显著抑制作用,辣椒叶色黄化突变体yl1抵抗光胁迫环境能力更强,尤其是在紫光下比野生型6421有更强的适应性。In order to explore the effect of light quality on the growth and development of yellow-leaf pepper plants,we used pepper leaf yellowing mutant yl1 and its wild type 6421 as test materials and treated with different light qualities(white light,blue light,red light,green light,purple light,yellow light and far red light).The changes of phenotypic,physiological and photosynthetic characteristics were studied.The results showed that:(1)blue light and red light promoted the growth of pepper seedlings,while yellow light and far red light significantly inhibited the growth of seedlings.Compared with yl1,6421 was more affected by different light qualities.(2)The photosynthetic pigment content of the two pepper materials decreased to varying degrees under different light qualities;the total chlorophyll content and carotenoid content of 6421 were higher than those of yl1 under different light qualities.The photosynthetic pigment content of yl1 and 6421 leaves was the lowest under purple light and yellow light,respectively.(3)Blue and green light could significantly increase the net photosynthetic rate(P_(n))of yl1,while different light quality treatments significantly reduced the P_(n) of 6421.(4)Purple light treatment significantly reduced the PSII potential activity(F_(v)/F o)and maximum photochemical efficiency(F_(v)/F m)of yl1 and significantly lower than that of 6421,but increased the photochemical quenching coefficient(q P)and non-photochemical quenching coefficient(NPQ)to resist photoinhibition damage.(5)Blue,red and green light can improve the activities of superoxide dismutase(SOD),peroxidase(POD)and catalase(CAT)in pepper,while yellow light is the opposite.In summary,blue light and red light can promote the growth and development of pepper,while yellow light and far red light have a significant inhibitory effect.yl1 has a stronger ability to resist light stress,especially under purple light than 6421.These results can provide theoretical basis and practical guidance for the light environment in pepper facility c

关 键 词：光质 辣椒 叶色黄化 突变体 生理特性 

分 类 号：Q945.79[生物学—植物学] S641.3[农业科学—蔬菜学]