Record ID No. |
5734 |
Author(s) |
Mai W.*, Xue X., Feng Gu. and Tian C. , 2018 |
Affiliation |
*Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, 830011, China. |
Title |
Simultaneously maximizing root/mycorrhizal growth and phosphorus uptake by cotton plants by optimizing water and phosphorus management. |
Source. Vol.(no):Page |
BMC Plant Biology. 18(334). |
Categories |
|
Subjects |
Methodology |
Sub-subjects |
Phosphorus metabolism Soil Moisture |
Host |
Cotton |
Organism |
NA |
Country |
China |
Abstracts |
There are two plant phosphorus (P)-uptake pathways, namely the direct P uptake by roots and the indirect P uptake through arbuscular mycorrhizal fungi (AMF). Maximizing the efficiency of root and AMF processes associated with P acquisition by adjusting soil conditions is important for simultaneously ensuring high yields and the efficient use of available P. A root box experiment was conducted in 2015 and 2016. The aim was to investigate the effects of different P and soil water conditions on root/mycorrhizal growth and P uptake by cotton plants. Hyphal growth was induced in well-watered soil, but decreased with increasing P concentrations. Additionally, P fertilizers regulated root length only under well-watered conditions, with the longest roots observed in response to 0.2 g P2O5 kg− 1. In contrast, root elongation was essentially unaffected by P fertilizers under drought conditions. And soil water in general had more significant effects on root and hyphal growth than phosphorus levels. In well-watered soil, the application of P significantly increased the cotton plant P uptake, but there were no differences between the effects of 0.2 and 1 g P2O5 kg− 1. So optimizing phosphorus inputs and soil water can increase cotton growth and phosphorus uptake by maximizing the efficiency of phosphorus acquisition by roots/mycorrhizae. Soil water and P contents of 19–24% and 20–25 mg kg− 1, respectively, simultaneously maximized root/mycorrhizal growth and P uptake by cotton plants. |