Understanding phosphorus status and P translocation within wheat plant in a split-root system

Abstract

Plants are not uniform in their nutritional requirements, most of them survive underadverse conditions of humidity, temperature, and nutrients. Because they are geneticallyadapted to their habitats and even some varieties of the same species show differencesin absorption, translocation, accumulation and nutrient use. This study is aimed atexamining the phosphorus (P) status in the different parts of wheat (Triticum aestivumL.) plant and its influence on plant growth and P translocation in a split-root soil culture.KH2PO4 was used as the source of phosphorus for the different level of P application.Two recently BARI developed wheat varieties namely BARI GOM 25 and BARI GOM 26were used as testing plants. . Result showed the growth parameter increased with theincrease of P application. Likewise, P uptake by wheat plant also increases with theelevated P application. However, no significant differences were observed betweenwheat varieties irrespective of growth and P uptake by wheat plant. Moreover, elevatedP concentrations in the shoot of wheat plants probably provide more P for shootunloading of P and for P assimilation in the controlled roots. This phenomenon results inincreased P concentrations in the roots of wheat plants that mean translocation of P inthe roots. These findings indicate that the added soluble P increases the absorption ofnutrients from the soil solution. So, this study concluded that the application of elevatedP in split-root system is efficient both for increasing shoot development and root growthand plays significant role in thePtranslocationwithin the wheat plants.