Improving drought tolerance by altering the photosynthetic rate and stomatal aperture via green light in tomato (Solanum lycopersicum L.) seedlings under drought conditions

Bian, Z., Zhang, X., Wang, Y. and Lu, C. ORCID: 0000-0002-0064-4725, 2019. Improving drought tolerance by altering the photosynthetic rate and stomatal aperture via green light in tomato (Solanum lycopersicum L.) seedlings under drought conditions. Environmental and Experimental Botany, 167: 103844. ISSN 0098-8472

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Abstract

The regulation of stomatal aperture is one of the most important strategies for plants to tolerate drought. Green light has been shown to reverse some effects of red light and/or blue light on plant growth and development and can enhance plant defense against biotic and/or abiotic stress by triggering the expression of specific genes. However, the effects of green light on plant drought tolerance are still unknown. To elucidate the effects of green light on plant drought tolerance, tomato (Solanum lycopersicum L.) seedlings were treated with short-term drought stress and were concomitantly exposed to red and blue light-emitting diodes (LEDs) supplemented with or without green light in an environment-controlled growth chamber. The results show that adding green light induced significant decreases in stomatal conductance (gs), which increased the intrinsic and instantaneous water-use efficiency, concomitantly enhanced mesophyll conductance (gm) and maintained relatively high photosynthetic capability under short-term drought stress. Moreover, green light supplementation alleviated stomatal opening and not only involved the downregulation of the SlHA1, 2 and 4 during stomatal opening but also resulted from a SlAREB1-activated signaling pathway, which led to drought tolerance.

Item Type: Journal article
Publication Title: Environmental and Experimental Botany
Creators: Bian, Z., Zhang, X., Wang, Y. and Lu, C.
Publisher: Elsevier
Date: November 2019
Volume: 167
ISSN: 0098-8472
Identifiers:
NumberType
10.1016/j.envexpbot.2019.103844DOI
S0098847219305441Publisher Item Identifier
Divisions: Schools > School of Animal, Rural and Environmental Sciences
Depositing User: Linda Sullivan
Date Added: 05 Aug 2019 10:38
Last Modified: 10 Sep 2019 14:57
URI: http://irep.ntu.ac.uk/id/eprint/37178

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