干旱区生态环境知识资源中心(Arid): A novel plant growth regulator brazide improved maize water productivity in the arid region of Northwest China

Arid

DOI	10.1016/j.agwat.2023.108441
	A novel plant growth regulator brazide improved maize water productivity in the arid region of Northwest China
	He, Rui; He, Min; Xu, Haidong; Zhang, Kun; Zhang, Mingcai; Ren, Dan; Li, Zhaohu; Zhou, Yuyi; Duan, Liusheng
通讯作者	Zhou, YY
来源期刊	AGRICULTURAL WATER MANAGEMENT
ISSN	0378-3774
EISSN	1873-2283
出版年	2023
卷号	287
英文摘要	Maize yield is limited by water deficit in the arid and semiarid regions of China. Conserving water and enhancing crop water productivity are inevitable requirements for the sustainable development of water efficient agricul-ture. Plant growth regulators (PGRs) play important roles in maize water stress tolerance. In this study, we investigated the effect of plant growth regulator-brazide, a functional analog of brassinolide (BR), on maize water stress resistance through a two-year (2020-2021) field experiment. The experiment included four water treatments (I100: 4012 m3 ha-1; I80: 3210 m3 ha-1; I60: 2407 m3 ha-1; I40: 1605 m3 ha-1), four PGR con-centrations (CK: water; Bra: 0.1 & mu;mol L-1 14-hydroxylated brassinosteroid; B1: 0.1 & mu;mol L-1 brazide; B2: 1 & mu;mol L-1 brazide; B3: 10 & mu;mol L-1 brazide). The results showed that deficit irrigation (I60 and I40) decreased soil water content (SWC), photosynthetic rate (Pn), leaf area index (LAI), aboveground biomass (AB) and yield, but improved crop water productivity (WPc). Under deficit irrigation conditions, 1 & mu;mol L-1 brazide application also increased dry matter accumulation and grain yield, a result attributed to improvement of the photosynthetic rate and increases in the root bleeding saps, water productivity. 1 & mu;mol L-1 Brazide application reduced bare tip length, increasing kernel number per ear, thereby increased the yield of I60 and I40 by 15.1% and 11.4% (p & LE; 0.05; 2020), 16.4% and 20.4% (p & LE; 0.001; 2021), respectively. Path analysis showed brazide improved final yields by increasing thousand grain weight (TGW), photosynthetic rate (Pn) and WPc under deficit irrigation. The increase in TGW with brazide treatment was primarily attributed to the increase of Pn. Overall, Brazide increased maize drought resistance mainly by increasing Pn and WPc, with 1 & mu;mol L-1 brazide as an optimal concentration.
英文关键词	Irrigation Photosynthetic rate Leaf area index Grain yield Path analysis
类型	Article
语种	英语
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:001042715500001
WOS关键词	USE EFFICIENCY ; DEFICIT IRRIGATION ; DRIP IRRIGATION ; DROUGHT-STRESS ; FOOD SECURITY ; LOESS PLATEAU ; YIELD ; TOLERANCE ; RICE ; PARAMETERS
WOS类目	Agronomy ; Water Resources
WOS研究方向	Agriculture ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/395086
推荐引用方式 GB/T 7714	He, Rui,He, Min,Xu, Haidong,et al. A novel plant growth regulator brazide improved maize water productivity in the arid region of Northwest China[J],2023,287.
APA	He, Rui.,He, Min.,Xu, Haidong.,Zhang, Kun.,Zhang, Mingcai.,...&Duan, Liusheng.(2023).A novel plant growth regulator brazide improved maize water productivity in the arid region of Northwest China.AGRICULTURAL WATER MANAGEMENT,287.
MLA	He, Rui,et al."A novel plant growth regulator brazide improved maize water productivity in the arid region of Northwest China".AGRICULTURAL WATER MANAGEMENT 287(2023).