Distinct mechanisms for aerenchyma formation in leaf sheaths of rice genotypes displaying a quiescence or escape strategy for flooding tolerance.

ABSTRACT:

Background and aims

Rice is one of the few crops able to withstand periods of partial or even complete submergence. One of the adaptive traits of rice is the constitutive presence and further development of aerenchyma which enables oxygen to be transported to submerged organs. The development of lysigenous aerenchyma is promoted by ethylene accumulating within the submerged plant tissues, although other signalling mechanisms may also co-exist. In this study, aerenchyma development was analysed in two rice (Oryza sativa) varieties, 'FR13A' and 'Arborio Precoce', which show opposite traits in flooding response in terms of internode elongation and survival.

Methods

The growth and survival of rice varieties under submergence was investigated in the leaf sheath of 'FR13A' and 'Ar

SUBMITTER: Parlanti S 

PROVIDER: S-EPMC3101152 | biostudies-literature | 2011 Jun

REPOSITORIES: biostudies-literature