Bøger af Walker Williams

Soil salinity is a major abiotic stress, which limits the growth and productivity of plants and crops. There are two phases of salinity stress on plants, namely, the osmotic phase and the ionic phase. The osmotic phase happens immediately after salinity stress and leads to a rapid inhibition in the growth of the plant. On the other hand, ionic phase occurs after several days or weeks of salinity stress. In the ionic phase, ions are accumulated in highly toxic levels in the shoot, which adversely affects the shoot function. Plants have developed various physiological and biological mechanisms for tolerating and dealing with salinity. It can be bifurcated into three mechanisms which include osmotic tolerance, ion exclusion and tissue tolerance. Research has also been conducted for developing molecular and genomic approaches that can help crop plants develop tolerance towards salinity stress. This book provides significant information of on this topic to help develop a good understanding of salinity tolerance in plants. It consists of contributions made by international experts. With state-of-the-art inputs by acclaimed experts of this field, this book targets students and professionals associated with the field of agriculture and plant science.

Plants are exposed to a number of biotic and abiotic stresses. Soil salinity is one of the major abiotic stresses, which negatively affects plant growth and crop production. Stress due to salinity leads to various changes in the physiological and metabolic processes based on the severity and duration of the stress. In the initial stages, soil salinity leads to osmotic stress, which causes physiological changes such as nutrient imbalance, interruption of membranes, decreased photosynthetic activity, and inhibition of the ability to detoxify the reactive oxygen species. In the later stage, soil salinity leads to ionic toxicity that leads to nutrient imbalance in the cytosol. In order to overcome salinity stress, plants have developed several mechanisms such as ion homeostasis and compartmentalization, ion transport and uptake, generation of nitric oxide (NO), and synthesis of polyamines. This book includes some of the vital pieces of works being conducted across the world on various topics related to plant salinity tolerance. It will help the readers in keeping pace with the rapid changes in this area of study.