Effect of Abiotic Stress on Onion Yield: A Review

Abstract

Onion (Allium cepa L.) is a spice crop and a valuable economic crop cultivated in a variety of environments around the world. Because of its export demand, it is extremely important in terms of foreign exchange. Drought stress, waterlogging stress, heat stress, cold stress, and salinity stress all have an impact on onion growth, production, and yield in different ways. A lack of water causes low productivity, therefore to increase onion yield, a constant supply of water is needed. Onions are particularly susceptible to salt stress. The number of bulbs per unit area, height, and fresh weight of onion bulbs, are all affected by salinity in irrigation water. It has an effect on bulbing and the quality of harvested bulbs. Waterlogging has a major effect on bulb development and yield at various growth stages. Waterlogging stress in onions may prevent moving from source to sink, lowering bulb yield. The possible flavor of onions can be affected by the surrounding climate. The bulbing response is influenced by temperature, and the degree to which it is influenced varies by variety. As the temperature increases, the number of leaves decreases. The bulb diameter, bulb weight, and bulbing index (bulb/neck diameter) all increase as the temperature rises. This review provides an in-depth description of the effect of abiotic stress on onion yield.

Nano-Food Farming Approaches to Mitigate Heat Stress under Ongoing Climate Change: A Review

“…Heat stress can cause significant reductions in crop yield and reduce the synthesis of starch, protein, fiber, and essential mineral contents [109]. Yield reductions up to 50% have been reported in onion (Allium cepa L.) [142], cotton (Gossypium hirsutum L.) [143], and rice (Oryza sativa L.) [144]. Plant adaptation to heat stress can be summarized with the following strategies:…”

Effect of the Exogenous Application of Different Concentrations of Indole-3-Acetic Acid as a Growth Regulator on Onion (Allium cepa L.) Cultivation

“…The main challenges are the impact of diseases caused by pathogens, such as fungi and bacteria [4,5], as well as the presence of insect pests that affect plant health and bulb quality [6,7]. Moreover, abiotic stress, such as adverse weather conditions and water availability, can negatively influence the growth and development of the onion crop [8,9]. The quality of crops are fundamental aspects to guarantee food safety [10].…”

NRD: Nicotiana Resistance Database, a Comprehensive Platform of Stress Tolerance in Nicotiana

“…The pathogens of Nicotiana diseases cause extensive damage to tobacco, especially various viral diseases, such as tobacco mosaic virus (TMV), potato virus Y (PVY), cucumber mosaic virus (CMV), among others [19,20]. Abiotic stress, such as heat, cold, drought, waterlogging, and freezing, has caused many productivity reductions [21].…”