Exogenous Ca enhances antioxidant defense in rice to simulated acid rain by regulating ascorbate peroxidase and glutathione reductase.

Exogenous calcium enhances rice tolerance to acid rain stress by regulating isozymes composition and transcriptional expression of ascorbate peroxidase and glutathione reductase. Calcium (Ca) participates in signal transduction in plants under abiotic stress, and addition of Ca is beneficial to alleviate damage of plants caused by acid rain. To clarify the effect of exogenous Ca on tolerance of plants to acid rain stress, we investigated regulation of Ca (5 mM) on activities, isozymes composition and transcriptional expression of ascorbate peroxidase (APX) and glutathione reductase (GR), redox state, and HO concentration and growth in rice leaves and roots under simulated acid rain (SAR) stress.

Comparison of plasma membrane H-ATPase response to acid rain stress between rice and soybean.

Acid rain is a global environmental issue due to inhibiting severely plant growth and productivity. To discover the tolerant mechanism in plants under acid rain stress, we studied the difference in response of two crops (rice and soybean) to simulated acid rain (pH 5.0 ~ 2.