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Integrated Analysis of Morphological, Physiological, Anatomical and Molecular Responses of Cassava Seedlings to Different Light Qualities

文献类型： 外文期刊

作者： Zhou, Qin 1 ; Li, Ruimei 1 ; Fernie, Alisdair R. 4 ; Che, Yannian 1 ; Ding, Zhongping 1 ; Yao, Yuan 2 ; Liu, Jiao 2 ; Wang, Yajie 2 ; Hu, Xinwen 1 ; Guo, Jianchun 1 ;

作者机构： 1.Hainan Univ, Sch Life Sci, Haikou 570228, Peoples R China

2.Chinese Acad Trop Agr Sci, Inst Trop Biosci & Biotechnol, Key Lab Biol & Genet Resources Trop Crops, Haikou 571101, Peoples R China

3.Hainan Inst Trop Agr Resources, Key Lab Biol & Genet Resources Trop Crops Hainan P, Haikou 571101, Peoples R China

4.Max Planck Inst Mol Plant Physiol, Muhlenberg 1, D-14476 Potsdam, Germany

关键词： light quality; cassava; plant growth; antioxidant; carbohydrate content; gene expression; chlorophyll; tissue culture; in vitro

期刊名称：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES （ 影响因子：5.6； 五年影响因子：6.2 ）

ISSN： 1661-6596

年卷期： 2023 年 24 卷 18 期

页码：

收录情况： SCI

摘要： Light quality is highly important for growth control of in vitro plant cultures. Here, we investigated the effect of blue light (BL), red light (RL) and combined red and blue light (RBL) on in vitro cassava growth. Our results indicate that RL facilitated radial elongation of cassava and increased stomatal conductance as well as glucose, sucrose, fructose and starch content in leaves and cellulose content in the stem. It also enhanced SOD and POD activities but decreased the stomatal density and chlorophyll and carotenoid content in leaves. In addition, RL leads to shorter palisade cells, denser chloroplasts and more starch granules. These phenotypic changes were inverted following BL treatment. The expression levels of photosynthesis-related genes MeLHCA1, MeLHCA3, MePSB27-2, MePSBY, MePETE1 and MePNSL2 in leaves were at their lowest following RL treatment, while the expression levels of MePSB27-2, MePSBY, MePETE1 and MePNSL2 were at their highest after BL treatment. The phenotypic changes after RBL treatment were between the values observed for the RL and BL treatments alone. Moreover, the responses of SC8 and SC9 cassava varieties to light quality were largely conserved. As such, we believe that the results of this study lay the foundation for controlling the in vitro growth of cassava seedlings by light quality.

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