Agronomic and Physiological Traits Response of Three Tropical Sorghum (Sorghum bicolor L.) Cultivars to Drought and Salinity

被引:2
作者
Dewi, Elvira Sari [1 ,2 ]
Abdulai, Issaka [1 ]
Bracho-Mujica, Gennady [1 ]
Appiah, Mercy [1 ]
Roetter, Reimund P. [1 ,3 ]
机构
[1] Univ Gottingen, Dept Crop Sci, Trop Plant Prod & Agr Syst Modelling TROPAGS, Grisebachstr 6, D-37077 Gottingen, Germany
[2] Univ Malikussaleh, Fac Agr, Dept Agroecotechnol, Aceh Utara 24355, Indonesia
[3] Univ Gottingen, Ctr Biodivers & Sustainable Land Use CBL, Busgenweg 1, D-37077 Gottingen, Germany
来源
AGRONOMY-BASEL | 2023年 / 13卷 / 11期
基金
欧盟地平线“2020”;
关键词
sorghum; Plantarray; HTP; physiological traits; transpiration; yield; abiotic stress; drought tolerance; salinity tolerance; salinity sensitive; SALT STRESS; ABIOTIC STRESSES; PRODUCTIVITY; YIELD; WATER; MANAGEMENT; TOLERANCE; SINGLE; GROWTH; PLANTS;
D O I
10.3390/agronomy13112788
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
Sorghum holds the potential for enhancing food security, yet the impact of the interplay of water stress and salinity on its growth and productivity remains unclear. To address this, we studied how drought and salinity affect physiological traits, water use, biomass, and yield in different tropical sorghum varieties, utilizing a functional phenotyping platform, Plantarray. Cultivars (Kuali, Numbu, Samurai2) were grown under moderate and high salinity, with drought exposure at booting stage. Results showed that Samurai2 had the most significant transpiration reduction under moderate and high salt (36% and 48%) versus Kuali (22% and 42%) and Numbu (19% and 16%). Numbu reduced canopy conductance (25% and 15%) the most compared to Samurai2 (22% and 33%) and Kuali (8% and 35%). In the drought*salinity treatment, transpiration reduction was substantial for Kuali (54% and 57%), Samurai2 (45% and 60%), and Numbu (29% and 26%). Kuali reduced canopy conductance (36% and 53%) more than Numbu (36% and 25%) and Samurai2 (33% and 49%). Biomass, grain yield, and a-100 grain weight declined in all cultivars under both salinity and drought*salinity, and Samurai2 was most significantly affected. WUEbiomass significantly increased under drought*salinity. Samurai2 showed reduced WUEgrain under drought*salinity, unlike Kuali and Numbu, suggesting complex interactions between water limitation and salinity in tropical sorghum.
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页数:18
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