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Leaf functional trait variation associated with salt tolerance in perennial ryegrass
Author(s) -
Hu T.,
Zhang X. Z.,
Sun J. M.,
Li H. Y.,
Fu J. M.
Publication year - 2014
Publication title -
plant biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.871
H-Index - 87
eISSN - 1438-8677
pISSN - 1435-8603
DOI - 10.1111/plb.12012
Subject(s) - perennial plant , biology , lolium perenne , salinity , trait , cultivar , agronomy , quantitative trait locus , genetic variation , phylogenetic tree , botany , ecology , genetics , gene , computer science , programming language
Salinity is one of major environmental stresses that dramatically threaten plant growth, and variations in genetic structure and functional traits have important effects on the salt tolerance of perennial ryegrass ( L olium perenne L .). The objectives of this study were to: (i) assess the inter‐clonal variation of functional traits of accessions among geographic groups or between wild and commercial groups in response to salt stress; (ii) develop a mathematical model to effectively assess salt tolerance of perennial ryegrass accessions originating from different geographic populations; and (iii) determine the relation between spatial genetic structure and salt tolerance in perennial ryegrass. Wide variations were found among the accessions for seven functional traits. One regression model ( F = 0.49 × F 1 + 0.303 × F 2 + 0.207 × F 3 ) was established to ascertain salt tolerance of each accession. The highest variation of the traits and salt tolerance were obtained for accessions from the E uropean group. Wild accessions exhibited more variation in functional traits and salt tolerance than commercial cultivars. Both molecular marker techniques and functional traits were used to conduct phylogenetic analysis, and the majority of accessions from the same or adjacent regions were clustered into the same group or subgroup. The perennial ryegrass accessions with similar salt tolerance had a close phylogenetic background. The patterns in functional trait variations associated with salt tolerance might allow acceleration of the process for improving salt stress resistance in perennial ryegrass.