A novel plant growth regulator brazide improved maize water productivity in the arid region of Northwest China
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 agriculture. Plant growth regulators (PGRs) play important roles in maize water str...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-09-01
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| Series: | Agricultural Water Management |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0378377423003062 |
| _version_ | 1797746021223104512 |
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| author | Rui He Min He Haidong Xu Kun Zhang Mingcai Zhang Dan Ren Zhaohu Li Yuyi Zhou Liusheng Duan |
| author_facet | Rui He Min He Haidong Xu Kun Zhang Mingcai Zhang Dan Ren Zhaohu Li Yuyi Zhou Liusheng Duan |
| author_sort | Rui He |
| collection | DOAJ |
| description | 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 agriculture. 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 concentrations (CK: water; Bra: 0.1 μmol L−1 14-hydroxylated brassinosteroid; B1: 0.1 μmol L−1 brazide; B2: 1 μmol L−1 brazide; B3: 10 μmol 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 μmol 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 μmol 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 ≤ 0.05; 2020), 16.4% and 20.4% (p ≤ 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 μmol L−1 brazide as an optimal concentration. |
| first_indexed | 2024-03-12T15:31:10Z |
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| id | doaj.art-16f3fb5f9df643b69ea5f9cc87ec78f0 |
| institution | Directory Open Access Journal |
| issn | 1873-2283 |
| language | English |
| last_indexed | 2024-03-12T15:31:10Z |
| publishDate | 2023-09-01 |
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| series | Agricultural Water Management |
| spelling | doaj.art-16f3fb5f9df643b69ea5f9cc87ec78f02023-08-10T04:33:39ZengElsevierAgricultural Water Management1873-22832023-09-01287108441A novel plant growth regulator brazide improved maize water productivity in the arid region of Northwest ChinaRui He0Min He1Haidong Xu2Kun Zhang3Mingcai Zhang4Dan Ren5Zhaohu Li6Yuyi Zhou7Liusheng Duan8State Key Laboratory of Plant Environmental Resilience, Engineering Research Center of Plant Growth Regulator, Ministry of Education, College of Agronomy and Biotechnology, China Agricultural University, No 2 Yuanmingyuan Xi Lu, Haidian District, Beijing 100193, ChinaState Key Laboratory of Plant Environmental Resilience, Engineering Research Center of Plant Growth Regulator, Ministry of Education, College of Agronomy and Biotechnology, China Agricultural University, No 2 Yuanmingyuan Xi Lu, Haidian District, Beijing 100193, ChinaState Key Laboratory of Plant Environmental Resilience, Engineering Research Center of Plant Growth Regulator, Ministry of Education, College of Agronomy and Biotechnology, China Agricultural University, No 2 Yuanmingyuan Xi Lu, Haidian District, Beijing 100193, ChinaState Key Laboratory of Plant Environmental Resilience, Engineering Research Center of Plant Growth Regulator, Ministry of Education, College of Agronomy and Biotechnology, China Agricultural University, No 2 Yuanmingyuan Xi Lu, Haidian District, Beijing 100193, ChinaState Key Laboratory of Plant Environmental Resilience, Engineering Research Center of Plant Growth Regulator, Ministry of Education, College of Agronomy and Biotechnology, China Agricultural University, No 2 Yuanmingyuan Xi Lu, Haidian District, Beijing 100193, ChinaChengdu new sun crop science co., Ltd, No. 28, north section of Tianfu Avenue, high tech Zone, Chengdu, Sichuan 611630, ChinaState Key Laboratory of Plant Environmental Resilience, Engineering Research Center of Plant Growth Regulator, Ministry of Education, College of Agronomy and Biotechnology, China Agricultural University, No 2 Yuanmingyuan Xi Lu, Haidian District, Beijing 100193, ChinaState Key Laboratory of Plant Environmental Resilience, Engineering Research Center of Plant Growth Regulator, Ministry of Education, College of Agronomy and Biotechnology, China Agricultural University, No 2 Yuanmingyuan Xi Lu, Haidian District, Beijing 100193, China; Corresponding author.State Key Laboratory of Plant Environmental Resilience, Engineering Research Center of Plant Growth Regulator, Ministry of Education, College of Agronomy and Biotechnology, China Agricultural University, No 2 Yuanmingyuan Xi Lu, Haidian District, Beijing 100193, China; College of Plant Science and Technology, Beijing University of Agriculture, Beinong Road 7, Changping, Beijing 102206, ChinaMaize 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 agriculture. 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 concentrations (CK: water; Bra: 0.1 μmol L−1 14-hydroxylated brassinosteroid; B1: 0.1 μmol L−1 brazide; B2: 1 μmol L−1 brazide; B3: 10 μmol 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 μmol 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 μmol 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 ≤ 0.05; 2020), 16.4% and 20.4% (p ≤ 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 μmol L−1 brazide as an optimal concentration.http://www.sciencedirect.com/science/article/pii/S0378377423003062IrrigationPhotosynthetic rateLeaf area indexGrain yieldPath analysis |
| spellingShingle | Rui He Min He Haidong Xu Kun Zhang Mingcai Zhang Dan Ren Zhaohu Li Yuyi Zhou Liusheng Duan A novel plant growth regulator brazide improved maize water productivity in the arid region of Northwest China Agricultural Water Management Irrigation Photosynthetic rate Leaf area index Grain yield Path analysis |
| title | A novel plant growth regulator brazide improved maize water productivity in the arid region of Northwest China |
| title_full | A novel plant growth regulator brazide improved maize water productivity in the arid region of Northwest China |
| title_fullStr | A novel plant growth regulator brazide improved maize water productivity in the arid region of Northwest China |
| title_full_unstemmed | A novel plant growth regulator brazide improved maize water productivity in the arid region of Northwest China |
| title_short | A novel plant growth regulator brazide improved maize water productivity in the arid region of Northwest China |
| title_sort | novel plant growth regulator brazide improved maize water productivity in the arid region of northwest china |
| topic | Irrigation Photosynthetic rate Leaf area index Grain yield Path analysis |
| url | http://www.sciencedirect.com/science/article/pii/S0378377423003062 |
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