Silicic and Ascorbic Acid Induced Modulations in Photosynthetic, Mineral Uptake, and Yield Attributes of Mung Bean (Vigna radiata L. Wilczek) under Ozone Stress

Abstract

Most of the world's crop production and plant growth are anticipated to be seriously threatened by the increasing tropospheric ozone (O 3 ) levels. The current study demonstrates how different mung bean genotypes reacted to the elevated level of O 3 in the presence of exogenous ascorbic and silicic acid treatments. It is the first report to outline the potential protective effects of ascorbic and silicic acid applications against O 3 toxicity in 12 mung bean {Vigna radiata (L.) Wilken} varieties. Under controlled circumstances, the present investigation was conducted in a glass house. There were four different treatments used: control (ambient O 3 concentration of 40−45 ppb), elevated O 3 (120 ppb), elevated O 3 with silicic acid (0.1 mM), and elevated O 3 with ascorbic acid (10 mM). Three varieties, viz. NM 20-21, NM 2006, and NM 2016, showcased tolerance to O 3 toxicity. Our findings showed that ascorbic and silicic acid applications gradually increased yield characteristics such as seed yield, harvest index, days to maturity, and characteristics related to gas exchange such as transpiration rate, stomatal conductance, net photosynthetic activity, and water-use efficiency. Compared to the control, applying both growth regulators enhanced the mineral uptake across all treatments. Based on the findings of the current study, it is concluded that the subject mung bean genotypes responded to silicic acid treatment more efficiently than ascorbic acid to mitigate the harmful effects of O 3 stress.

Ameliorative Effects of Exogenous Potassium Nitrate on Antioxidant Defense System and Mineral Nutrient Uptake in Radish (Raphanus sativus L.) under Salinity Stress

“…Appropriate ion uptake is not only crucial for plant development under normal conditions but also very important during salt-induced oxidative stress conditions since it directly disturbed the cellular redox status by disrupting the ion homeostasis . Saline stress caused osmotic stress in plants, contributing to the excessive production of soluble salts endogenously that lead to a reduced uptake of essential nutrients. , During stressful conditions, the main reasons for nutritional disorders are the availability, absorption or uptake, and distribution of nutrients within the plant . In saline soils, the obtainability of essential micronutrients mainly depends on the solubility of the micronutrients, occurrence of the binding sites on the surfaces of organic and inorganic particles, soil solution pH and redox potential, and the type of plant species. , In the current report, the lower uptake of essential nutrients (Mg 2+ , Ca 2+ , and P) was displayed by both root and shoot of the Raphanus sativus L., which were exposed to saline stress as compared nontreated plants.…”

Seed Priming Modulates Physiological and Agronomic Attributes of Maize (Zea mays L.) under Induced Polyethylene Glycol Osmotic Stress

“…Drastic shifts in environmental regimes are becoming a hindrance in achieving the growing demand of food and acquiring sustainable agriculture. , Climatic changes lead to fluctuations in temperature, droughts, floods, and other environmental calamities, eventually leading to decrease crop productivity . The abiotic stresses such as drought, extreme temperature, frost, heavy metals, − and salinity , severely impair plant growth and productivity worldwide. , Drought, being the most important environmental stress, severely damages plant growth and development . Salt stress leads to an imbalance between antioxidant concentrations and reactive oxygen species (ROS) levels, thus resulting in oxidative stress .…”

Bacterial-Mediated Salinity Stress Tolerance in Maize (Zea mays L.): A Fortunate Way toward Sustainable Agriculture

“…Abiotic stresses include drought, − low or high temperatures, salinity, , pesticides, heavy metals, − minerals, − and other environmental extremes. Abiotic stresses, especially salinity , and drought, − are some of the primary causes of crop loss worldwide. − Soil salinity imposes major threats to food security and productivity of agricultural crops worldwide . High salinity stress increases ionic influxes, impaired antioxidant enzymes activities, photosynthesis, , and free radicals, which lead to cellular malfunctions and consequently affect plant growth, biomass, and productivity. − Soil salinity is a foremost concern in agriculture throughout the world and is affecting about 800 million hectares of cropland .…”