Plant growth habit,root architecture traits and tolerance to low soil phosphorus in an Andean bean population |
| |
| Authors: | Karen A Cichy Sieglinde S Snapp Matthew W Blair |
| |
| Institution: | (1) Department of Horticulture, Michigan State University, East Lansing, MI 48823, USA;(2) USDA-ARS, 1691 S 2700 W, Aberdeen, ID 83210, USA;(3) Department of Crop and Soil Science and W.K. Kellogg Biological Station, Michigan State University, East Lansing, MI 48823, USA;(4) Biotechnology Unit, Centro Internacional de Agricultura Tropical (CIAT), Cali, Colombia |
| |
| Abstract: | The optimal plant growth habit and architecture of common bean (Phaseolus vulgaris L.) is dependent on environmental conditions. The objectives of this research were to determine if plant growth habit impacts
a plant’s ability to grow in low P conditions, as measured by P uptake, seed yield, and P use efficiency and to determine
if aboveground plant growth habit and root growth are associated at variable P soil levels. The study was carried out with
recombinant inbred lines developed from an Andean intra-gene pool cross between a low P tolerant parent with an indeterminate
growth habit (G19833) and a low P susceptible parent with a determinate growth habit (AND696). The population was grown for
2 years in low and sufficient P conditions in a field site in Darien, Colombia. In the first season, indeterminate lines had
15% more seed yield than the determinate lines in the low P treatment, whereas there was no difference by growth habit in
the high P treatment. In the second season, seed yield and tolerance to low P was not influenced by growth habit. Root architectural
characteristics such as root length density (RLD) and root surface area were 25% and 34% greater respectively in the indeterminate
lines under P-sufficiency, whereas under low P, root architecture traits were not significantly different by growth habit.
Root plasticity was higher in determinate lines, although RLD and root surface area did not play a significant role in tolerance
to low P. Overall, the data were consistent with shoot growth habit as playing a complex and important role in adaptation
to P-deficiency. |
| |
| Keywords: | Determinate Indeterminate Root length density Root surface area |
| 本文献已被 SpringerLink 等数据库收录！ |
|
