Drought avoidance strategies offer the best prospects for developing plants capable of improvedperformance under water deficit. Previous research established that rice genotypes differed in rootgrowth below a hardpan and in water extraction under water deficit, and these results had implicationsfor patterns of adaptation and crop performance. This work has now expanded via increased attentionto root-soil interactions under water deficit and mechanical impedance, including examining the roleof root osmotic adjustment in maintaining the growth and function of roots under water deficit. Recentresults on root-soil interactions will be presented, including variation among genotypes and theimplications for adaptation and selection. This paper draws from recent analyses of multilocation data,evidence collected in the Generation Challenge Program project on drought avoidance root traits andthe new ACIAR project on improved farming and marketing systems in rainfed southern Lao PDR.While the paper is based in crop physiology research, it is placed in a G x E or G x soil context toensure interest to a wider audience, such as those in the IRRC.
|Title of host publication||Third International Rice Congress|
|Subtitle of host publication||Rice for Future Generations|
|Publication status||Published - 2010|
|Event||International Rice Congress - Hanoi, Vietnam, Viet Nam|
Duration: 08 Nov 2010 → 12 Nov 2010
|Conference||International Rice Congress|
|Period||08/11/10 → 12/11/10|