UVA radiation promotes tomato growth through morphological adaptation leading to increased light interception
UVA radiation promotes tomato growth through morphological adaptation leading to increased light interception
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UVA 辐射通过形态适应增加光拦截来促进番茄生长
DOI：
10.1016/j.envexpbot.2020.104073
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发表时间：
2020-08
影响因子：
5.7
通讯作者：
Tao Li
中科院分区：
文献类型：
--
作者：
Yating Zhang;Elias Kaiser;Yuqi Zhang;Jie Zou;Zhonghua Bian;Qichang Yang;Tao Li
UVA辐射（315 ~ 400 nm）是太阳紫外线辐射的主要组成部分。虽然它与蓝光（400 ~ 500 nm）共享光感受器（即隐色素和光促素），但其在植物生物学中的功能在很大程度上尚不清楚。本研究旨在探讨UVA辐射如何影响植物的形态和生理，并在多大程度上区分这些影响与蓝光的不同。在相同光子通量密度（250 μmol⋅m−2⋅s−1）下，番茄生长在单色红（R/B = 7:1）、二色红、蓝（R/B = 7:1）、红色和两种不同UVA辐射水平（R/UVA分别= 7:1和15:1）下。UVA、B和R的峰值强度分别为370、450和660 nm。结果表明，UVA替代蓝光（在红光背景下）可诱导植物形态改变，表现为叶面积增大、叶角变陡、叶变平、茎变长。与蓝光相比，UVA对叶片次生代谢的影响减弱，导致总酚类物质和类黄酮含量以及吸收紫外线的化合物浓度显著降低。此外，UVA在形成光合机构的发育方面具有与蓝光相似的功能，因为两种波段都缓解了“红光综合征”（即光合能力低，光合电子传递减少，气孔反应迟钝）。综上所述：1)UVA通过形态适应促进番茄生长，从而增加对光的拦截；2) UVA对叶片次生代谢物积累的影响弱于蓝光；3) UVA在维持叶片光合作用方面的作用与蓝光相似。因此，不像以前提出的那样，UVA不能被明确地认为是一种非生物应激因子。这项研究增加了对植物响应UVA辐射过程的理解，并为未来人工光种植植物的配方提供了基础。
UVA radiation (315−400 nm) is the main component of solar UV radiation. Although it shares photoreceptors (i.e. cryptochromes and phototropins) with blue light (400−500 nm), its function in plant biology is unclear to a large extent. This study aimed at exploring how UVA radiation affects plant morphology and physiology, and at distinguishing to what extent these effects differ from those of blue light. Tomato plants were grown under monochromatic red (R), dichromatic red and blue (R/B = 7:1), as well as red and two different levels of UVA radiation (R/UVA = 7:1 and 15:1, respectively), with identical photon flux density (250 μmol⋅m−2⋅s−1). Peak intensities of UVA, B and R were 370, 450 and 660 nm, respectively. We showed that replacing blue by UVA (in a background of red light) induced plant morphological modifications, as reflected by larger leaf area, steeper leaf angles, flatter leaves and longer stems. UVA had reduced effects on leaf secondary metabolism compared to blue light, resulting in significantly lower total phenolics and flavonoid contents, as well as concentrations of UV-absorbing compounds. In addition, UVA had a similar function as blue light in shaping the development of the photosynthetic apparatus, as both wavebands alleviated the ‘red light syndrome’ (i.e. low photosynthetic capacity, reduced photosynthetic electron transport, and unresponsive stomata). We conclude that: 1) UVA promotes tomato growth through morphological adaptation leading to increased light interception; 2) UVA affects leaf secondary metabolite accumulation less strongly than blue light; 3) UVA functions similarly to blue light in maintaining leaf photosynthetic functioning. Thus, unlike previously suggested, UVA cannot be unequivocally considered as an abiotic stress factor. This research adds to the understanding of plant processes in response to UVA radiation and provides a basis for future recipes for growing plants with artificial light.
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影响因子：
3.3
作者：
T. Kotilainen;Tuulia Venäläinen;Riitta Tegelberg;A. Lindfors;R. Julkunen-Tiitto;S. Sutinen;R. O’Hara;P. Aphalo
通讯作者：
T. Kotilainen;Tuulia Venäläinen;Riitta Tegelberg;A. Lindfors;R. Julkunen-Tiitto;S. Sutinen;R. O’Hara;P. Aphalo
影响因子：
64.5
作者：
Pedmale UV;Huang SC;Zander M;Cole BJ;Hetzel J;Ljung K;Reis PAB;Sridevi P;Nito K;Nery JR;Ecker JR;Chory J
通讯作者：
Chory J
影响因子：
5.6
作者：
Shengxin C;Chunxia L;Xuyang Y;Song C;Xuelei J;Xiaoying L;Zhigang X;Rongzhan G
通讯作者：
Rongzhan G
DOI：
10.1111/j.1365-313x.2011.04598.x
发表时间：
2011-07
期刊：
The Plant journal : for cell and molecular biology
影响因子：
--
作者：
Keller MM;Jaillais Y;Pedmale UV;Moreno JE;Chory J;Ballaré CL
通讯作者：
Ballaré CL
影响因子：
5.7
作者：
K. Taulavuori;Valtteri Hyöky;J. Oksanen;E. Taulavuori;R. Julkunen-Tiitto
通讯作者：
K. Taulavuori;Valtteri Hyöky;J. Oksanen;E. Taulavuori;R. Julkunen-Tiitto