Salinity tolerance evaluation and mechanisms in bermudagrass (Cynodon spp.)

Abstract

Abstract: Bermudagrass (Cynodon spp.) is an important warm season turfgrass, forage, and soil and water conservation plant. Evaluation of salinity tolerance in bermudagrass cultivars and wild resources indicates that they are salinity-tolerant, can grow in saline soil, but there are significant genetic differences in the genus Cynodon. Salinity tolerance of bermudagrass is often less than that of saltgrass, manilagrass and seashore paspalum, but greater than Japanese zoysiagrass, rhodes grass, buffalo grass, centipedegrass and tall fescue. Na⁺ and K⁺ ion regulation and osmoregulation have been studied as mechanisms of salinity tolerance and bermudagrass has been found to reduce salt ions accumulation in shoots by means of salt glands secreting salt ions, ion selective transportation, stomatal regulation, and accumulation of osmotica such as betaine, proline, and soluble sugar. Finding key genes and their expression for ion selective absorption, transportation, distribution, synthesis of organic osmotica are important research directions in the future.

CLC Number:

CHEN Jing-bo, LIU Jian-xiu. Salinity tolerance evaluation and mechanisms in bermudagrass (Cynodon spp.)[J]. Acta Prataculturae Sinica, 2012, 21(5): 302-310.

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