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DOI	10.1016/j.agwat.2021.106964
	Evaluation of the physiological significance of leaf wetting by dew as a supplemental water resource in semi-arid crop production
	Yokoyama, Gaku; Yasutake, Daisuke; Minami, Keisuke; Kimura, Kensuke; Marui, Atsushi; Yueru, Wu; Feng, Jiaojiao; Wang, Weizhen; Mori, Makito; Kitano, Masaharu
通讯作者	Yasutake, D (通讯作者)，Kyushu Univ, Fac Agr, Nishi Ku, 744 Motooka, Fukuoka 8190395, Japan.
发表日期	2021
ISSN	0378-3774
EISSN	1873-2283
卷号	255
英文摘要	Dew is a frequently observed meteorological phenomenon and its importance to the water balance in arid and semi-arid regions has been recognized. The focus of our study was to evaluate the potential significance of leaf wetting by dew on semi-arid crop production in terms of its effects on plant physiological functions. We conducted a field experiment in a maizefield in northwest China. Leaf wetting by dew occurred on 45% of days during cultivation periods, and leaf water potential was higher for leaves wetted by dew than for those not wetted during the morning. In addition, we conducted a potted maize control experiment consisting of four treatments (two different soil water treatments: water-stressed and well-watered, and two different leaf wetting treatments: with and without leaf wetting). The water-stressed treatment strongly inhibited plant physiological functions (decrease in leaf water potential, stomatal closure, decrease in photosynthetic rate); therefore, growth rate decreased. However, in the water-stressed with leaf wetting plot, the maize leaves absorbed water from their surfaces during nighttime, which significantly increased pre-dawn leaf water potential. Consequently, this plot showed a higher photosynthetic rate than did the water-stressed without leaf wetting plot during daytime. The positive effects of leaf wetting on plant physiological functions were not explicit in the well-watered plots. We assumed that the positive effects of leaf wetting were mainly manifest as effects on plant-water relations; such effects may be limited when plants have sufficient water. As a result, water-stressed plants with leaf wetting showed greater water use efficiency. Our results indicate the importance of leaf wetting by dew as a water resource in semi-arid crop production owing its effects on plant physiological functions.
关键词	SURFACE WETNESS DESERT OASIS IRRIGATION PHOTOSYNTHESIS FOREST DROUGHT GROWTH REGION
英文关键词	Zea mays; Cornfield; Water use efficiency; Irrigation; Water stress
语种	英语
WOS研究方向	Agriculture ; Water Resources
WOS类目	Agronomy ; Water Resources
WOS记录号	WOS:000687381100007
来源期刊	AGRICULTURAL WATER MANAGEMENT
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/255082
作者单位	[Yokoyama, Gaku; Minami, Keisuke; Kimura, Kensuke] Kyushu Univ, Grad Sch Bioresource & Bioenvironm Sci, Nishi Ku, 7dd Motooka, Fukuoka 8190395, Japan; [Yasutake, Daisuke; Kitano, Masaharu] Kyushu Univ, Fac Agr, Nishi Ku, 744 Motooka, Fukuoka 8190395, Japan; [Marui, Atsushi] Hirosaki Univ, Fac Fac Agr & Life Sci, 3 Bunkyo Machi, Hirosaki, Aomori 0368561, Japan; [Yueru, Wu] Inner Mongolia Agr Univ, Coll Desert Control Sci & Engn, Hohhot 010018, Peoples R China; [Feng, Jiaojiao; Wang, Weizhen] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Remote Sensing Gansu Prov, Heihe Remote Sensing Expt Res Stn, Lanzhou 730000, Peoples R China; [Mori, Makito] Kochi Univ, Fac Agr, Nankoku, Kochi, Japan
推荐引用方式 GB/T 7714	Yokoyama, Gaku,Yasutake, Daisuke,Minami, Keisuke,et al. Evaluation of the physiological significance of leaf wetting by dew as a supplemental water resource in semi-arid crop production[J]. 中国科学院西北生态环境资源研究院,2021,255.
APA	Yokoyama, Gaku.,Yasutake, Daisuke.,Minami, Keisuke.,Kimura, Kensuke.,Marui, Atsushi.,...&Kitano, Masaharu.(2021).Evaluation of the physiological significance of leaf wetting by dew as a supplemental water resource in semi-arid crop production.AGRICULTURAL WATER MANAGEMENT,255.
MLA	Yokoyama, Gaku,et al."Evaluation of the physiological significance of leaf wetting by dew as a supplemental water resource in semi-arid crop production".AGRICULTURAL WATER MANAGEMENT 255(2021).