Decreased macro- and micro-nutrient contentAmongst the most important adverse effects of salinityon wheat growth is the decreased uptake of nutrientsby the plant. The macro-nutrient content has been correlatedwith the ratio of unsaturated to saturated fattyacids. The two stressful conditions (drought and salinity)decreased the plant’s content of Ca, Mg, and S in itsleaves, and increased the K and P content in the seedlingleaves grown under salinity stress. Although underboth stressed conditions, the micro-nutrient content ofwheat seedlings decreased, the effects of drought stresswere more pronounced [45,46].The effects of alkali and salinity stress on wheatnutrient uptake and metabolite accumulation werecompared by Guo et al. [46]. The results indicated thatthe adverse effects of alkali stress on wheat growth andphysiology was more pronounced than during salinitystress. Under alkali stress, due to the high pH and thesubsequent precipitation of phosphate and metal ions,the availability of ions for plant uptake significantlydecreased. Alkali stress resulted in significant and rapidincreases of Ca2þ in wheat roots; however, this was notthe case under salt stress as the Ca2þ concentrationdecreased in wheat roots.
Decreased macro- and micro-nutrient content<br>Amongst the most important adverse effects of salinity<br>on wheat growth is the decreased uptake of nutrients<br>by the plant. The macro-nutrient content has been correlated<br>with the ratio of unsaturated to saturated fatty<br>acids. The two stressful conditions (drought and salinity)<br>decreased the plant’s content of Ca, Mg, and S in its<br>leaves, and increased the K and P content in the seedling<br>leaves grown under salinity stress. Although under<br>both stressed conditions, the micro-nutrient content of<br>wheat seedlings decreased, the effects of drought stress<br>were more pronounced [45,46].<br>The effects of alkali and salinity stress on wheat<br>nutrient uptake and metabolite accumulation were<br>compared by Guo et al. [46]. The results indicated that<br>the adverse effects of alkali stress on wheat growth and<br>physiology was more pronounced than during salinity<br>stress. Under alkali stress, due to the high pH and the<br>subsequent precipitation of phosphate and metal ions,<br>the availability of ions for plant uptake significantly<br>decreased. Alkali stress resulted in significant and rapid<br>increases of Ca2þ in wheat roots; however, this was not<br>the case under salt stress as the Ca2þ concentration<br>decreased in wheat roots.
正在翻译中..