摘要
为探究培育皂荚壮苗的适宜光源,研究白光(W,对照)、蓝光(B)、红光(R)和红蓝光(R7B3)照射处理下皂荚幼苗的生长状态、叶片结构、光合特性和其他生理指标的差异。结果表明:R7B3处理下的皂荚幼苗生长状态最好,R7B3处理下的皂荚叶片厚度和栅栏组织厚度高于对照处理,叶面积小于对照。R处理下的皂荚幼苗叶绿素a+b和叶绿素b含量显著高于其他处理,叶绿素a/b比值显著低于其他处理,R7B3处理下的叶绿素a含量和类胡萝卜素含量均高于W、R和B处理。4种光质处理下皂荚幼苗的F_(v)/F_(m)和F_(v)/F_(o)值差异不显著,B处理下的最高。与对照相比,R处理下的α、ETR_(max)和I_(k)较小,而β较大。B和R7B3处理下的皂荚幼苗电子传递速率、光能转化率、光能捕获效率以及光合能力均较高,而R处理下的皂荚幼苗处于较低水平。4种光质处理下的皂荚幼苗可溶性糖含量差异不显著,W处理下淀粉含量和MDA含量均高于其他处理,R7B3处理下的CAT和POD活性高于其他处理。综上所述,R7B3处理下皂荚的壮苗指数较高叶片的光合能力和抗氧化能力较强,认为其是最利于皂荚幼苗的生长的光源。
The effects of different wavelengths of light produced by white light(W,control),blue light(B),red light(R)and red-blue light(R7B3)on growth state,leaf structure,photosynthetic characteristics and other physiological indicators of Gleditsia sinensis seedlings were studied in order to explore the suitable light source for cultivation of G.sinensis seedlings.The results showed that the seedling growth condition of G.sinensis under R7B3 treatment was the best,the thickness of G.sinensis leaf and palisade tissue were higher than that of the control,and the leaf area was smaller than that of the control.Under R treatment,chlorophyll a+b and chlorophyll b contents were significantly higher than those of other treatments,and chlorophyll a/b content was significantly lower than those of other treatments.The chlorophyll a content and carotenoid content of R7B3 treatment were higher than those of W,R and B treatment.We found that F_(v)/F_(m) and F_(v)/F_(o) values of G.sinensis seedlings under light quality treatment were not significantly different,and B treatment was the highest.Theα,ETR_(max) and I_(k) of R were smaller than those of the control,whileβwas larger than that of the control.The electron transfer rate,light energy conversion,light energy capture efficiency and photosynthetic capacity of G.sinensis seedlings under B and R7B3 treatments were higher,while those under R treatment were lower.There was no significant difference in soluble sugar content of G.sinensis seedlings under the four light quality treatments,starch content and MDA content were higher under W treatment,CAT and POD activities were higher under R7B3 treatment.In conclusion,R7B3treated G.sinensis had higher seedling strength index,stronger photosynthetic capacity and antioxidant capacity of leaves,and was considered to be the most favorable light source for the growth of G.sinensis seedlings.
作者
孟畅
赵杨
杨菊
王秀荣
刘堡森
张幸福
MENG Chang;ZHAO Yang;YANG Ju;WANG Xiurong;LIU Baosen;ZHANG Xingfu(College of Forestry,Guizhou University,Guiyang 550025,China;Guizhou Research Center of Forest Resources and Environment,Guiyang 550025,China)
出处
《植物生理学报》
CAS
CSCD
北大核心
2022年第10期1961-1972,共12页
Plant Physiology Journal
基金
贵州省科技计划项目(黔科合支撑[2020]1Y056号)。
关键词
皂荚
发光二极管
光合色素
叶绿素荧光
Gleditsia sinensis
light-emitting diode
photosynthetic pigment
chlorophyll fluorescence
