Uncover the salt tolerance potential of accessions based on photosynthetic attributes and interaction plot in tomato (Solanum lycopersicum)

Soil salinity, being world's gravest and increasing environmental threat, limits the growth and development in nearly all crop plants. The experiment was laid out to investigate the tomato local and exotic germplasm for morpho‐physiological and photosynthetic attributes under salinity stress (0...

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Bibliographic Details
Published in:Plant breeding 2021-02, Vol.140 (1), p.130-141
Main Authors: Rehman, Fazal, Munir, Hassan, Raza, Muhammad A., Saeed, Asif, Mason, Annaliese
Format: Article
Language:English
Subjects:
Breeding
Carotene
Carotenoids
Chlorophyll
Germplasm
interaction plot
Lycopene
morpho‐physiological trait
Phaeophytin
Phenotypes
Photosynthesis
Photosynthetic pigments
Physiology
Pigments
Principal components analysis
Salinity
Salinity effects
Salinity tolerance
Salt tolerance
seedling stage
Seedlings
Soil salinity
tomato
Tomatoes
Variance analysis
β-Carotene
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Summary:Soil salinity, being world's gravest and increasing environmental threat, limits the growth and development in nearly all crop plants. The experiment was laid out to investigate the tomato local and exotic germplasm for morpho‐physiological and photosynthetic attributes under salinity stress (0 (control), 8 and 12 dS m−1). The phenotype data for morpho‐physiological traits were collected; meanwhile, photosynthetic pigments were analysed also at seedling stage. Analysis of variance, interaction plot, PCV and GCV revealed significantly greater diversity among all accessions for subjecting attributes. Strikingly, principle component analysis (PCA) biplot and cluster heatmap exposed potentially salt tolerant accessions (NAQEEB, BL1076, PBLA1401, 017859, TINY TIM, BL1174, BL1078, PBLA1932, TOMMY TOE, PAKIT and CLN2413) under the highest level of salinity for β‐carotene, lycopene contents, chlorophyll b, carotenoids, pheophytin (b) and total pheophytin. The overall performance of the above‐mentioned accessions was found significant and exhibits tolerant attitude under high salt levels. We suggest that these tolerant accessions might facilitate as a potential source for further breeding programme to improve the agronomically important traits by exploiting both conventional as well as molecular breeding efforts.
ISSN:0179-9541
1439-0523
DOI:10.1111/pbr.12881