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Effects of nutritional stress on soil fertility and antioxidant enzymes of rice in different growth periods. | LitMetric

Effects of nutritional stress on soil fertility and antioxidant enzymes of rice in different growth periods.

Front Plant Sci

Guangxi Key Laboratory of Mango Biology, School of Agriculture and Food Engineering, Baise University, College of Baise, Baise, Guangxi, China.

Published: October 2024

AI Article Synopsis

  • - Stress in plants results from changes in environmental conditions that negatively affect their growth, prompting them to use various mechanisms to handle nutritional deficiencies.
  • - A field experiment assessed how different nutrient deficiencies (nitrogen, phosphorus, potassium) impacted rice plants by measuring soil nutrients and antioxidant enzyme activity during both growth stages.
  • - The study found that full fertilization significantly improved soil conditions and rice yield. Notably, nitrogen and phosphorus application reduced oxidative damage and influenced enzyme activity during different growth stages, highlighting the importance of proper fertilization for optimal rice production.

Article Abstract

Stress in plants denotes the detrimental impact of alterations in external environmental conditions on regular plant growth and development. Plants employ diverse mechanisms to mitigate or evade nutritional stress-induced damage. In order to investigate the physiological response mechanism of plants to nutritional stress and assess its impact on soil nutrient content and antioxidant enzyme activity in rice, a field experiment was conducted applying five treatments: control, nitrogen (N) deficiency, phosphorus (P) deficiency, potassium (K) deficiency, and full fertilization. Rice leaf and soil samples were concurrently gathered during both the vegetative and reproductive growth stages of rice. Analysis was conducted on soil N, P, and K levels, as well as leaf antioxidant enzyme activities, to investigate the impact of nutrient stress on rice antioxidant enzymes and soil fertility. The research findings indicate that full fertilization treatment enhanced the agronomic properties of the soil compared to the control treatment. In the N-deficiency treatment, reactive oxygen species (ROS) levels increased by 16.53-33.89% during the reproductive growth period compared to the vegetative growth period. The peroxidase (POD) activity decreased by 41.39% and superoxide dismutase (SOD) activity increased by 36.22% under K-deficiency treatment during the reproductive growth period compared to the vegetative growth period. Consequently, applying N and P fertilizer during the vegetative growth period can decrease membrane lipid peroxidation levels by 7.34-72.53%. The full fertilization treatment markedly enhanced rice yield compared to other treatments and increased the Nitrogen activation coefficient (NAC) and Phosphorus activation coefficient (PAC) in the soil, while decreasing the PAC. Elevating NAC levels can stimulate the activity or content of PRO, MDA, and RPS during the vegetative growth stage, whereas in the reproductive growth stage, it will decrease the content of ROS, PRO, and MDA. This data offers valuable insights and theoretical support for nutritional stress research.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11523062PMC
http://dx.doi.org/10.3389/fpls.2024.1471682DOI Listing

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