Scientific Reports· 2019Q1
Interactive effects of drought and heat stresses on morpho-physiological attributes, yield, nutrient uptake and oxidative status in maize hybrids
- 624citations
- Q1SCImago
- 2019year
Short summary
Combining drought and heat stress severely impacts maize growth, reducing yield and nutrient uptake more than either stress alone. Hybrid Xida 889 showed greater tolerance due to a stronger antioxidant defense system compared to Xida 319.
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Key points
- Combined drought and heat stress significantly reduces maize yield and nutrient uptake compared to single stresses.
- Both stresses induce oxidative stress via ROS production and increase malondialdehyde content.
- Hybrid Xida 889 exhibits greater tolerance to combined stresses than Xida 319.
- Xida 889's tolerance is linked to a stronger antioxidant system, higher osmolyte accumulation, and better nutrient balance.
AI-generated from the title and abstract; the full text is not read.
Abstract
Abstract Maize is a sensitive crop to drought and heat stresses, particularly at the reproductive stages of development. The present study investigated the individual and interactive effects of drought (50% field capacity) and heat (38 °C/30 °C) stresses on morpho-physiological growth, yield, nutrient uptake and oxidative metabolism in two maize hybrids i.e., ‘Xida 889’ and ‘Xida 319’. The stress treatments were applied at tasseling stage for 15 days. Drought, heat and drought + heat stress caused oxidative stress by the over-production of ROS (O 2− , H 2 O 2 , OH − ) and enhanced malondialdehyde contents, which led to reduced photosynthetic components, nutrients uptake and yield attributes. The concurrent occurrence of drought and heat was more severe for maize growth than the single stress. However, both stresses induced the metabolites accumulation and enzymatic and non-enzymatic antioxidants to prevent the oxidative damage. The performance of Xida 899 was more prominent than the Xida 319. The greater tolerance of Xida 889 to heat and drought stresses was attributed to strong antioxidant defense system, higher osmolyte accumulation, and maintenance of photosynthetic pigments and nutrient balance compared with Xida 319.
The authors' abstract, as published at the source. Scientific Reports, 2019 · DOI ↗
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Field: Agronomy and Crop Science
Agronomy and Crop ScienceAgricultural and Biological Sciences