Leaf morphology, rather than plant water status, underlies genetic variation of rice leaf rolling under drought.

ABSTRACT: Soil drying causes leaf rolling in rice, but the relationship between leaf rolling and drought tolerance has historically confounded selection of drought-tolerant genotypes. In this study on tropical japonica and aus diversity panels (170-220 genotypes), the degree of leaf rolling under drought was more affected by leaf morphology than by stomatal conductance, leaf water status, or maintenance of shoot biomass and grain yield. A range of canopy temperature and leaf rolling (measured as change in normalized difference vegetation index [ΔNDVI]) combinations were observed among aus genotypes, indicating that some genotypes continued transpiration while rolled. Association mapping indicated colocation of genomic regions for leaf rolling score and ΔNDVI under drought with previously reported le

SUBMITTER: Cal AJ 

PROVIDER: S-EPMC6487826 | biostudies-literature | 2019 May

REPOSITORIES: biostudies-literature