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.

中文翻译：

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根据光合特性和互作图揭示番茄（Solanum lycopersicum）的耐盐性潜力

土壤盐碱度是世界上最严重的环境威胁，并且日益严峻，它限制了几乎所有农作物的生长和发育。进行该实验以研究盐胁迫（0（对照），8和12 dS m ^-1）下番茄本地和外来种质的形态生理和光合特性）。收集了形态生​​理特征的表型数据。同时，在苗期也分析了光合色素。方差，交互作用图，PCV和GCV的分析表明，所有受主属性的材料之间的差异明显更大。引人注目的是，在最大盐度水平下，主成分分析（PCA）双图和聚类热图暴露了潜在的耐盐成分（NAQEEB，BL1076，PBLA1401、017859，TINY TIM，BL1174，BL1078，PBLA1932，TOMMY TOE，PAKIT和CLN2413）胡萝卜素，番茄红素含量，叶绿素b，类胡萝卜素，脱镁叶绿素（b）和总脱镁叶绿素。发现上述种质的总体表现显着，并且在高盐水平下表现出宽容的态度。我们建议这些耐性种质可能通过进一步利用常规育种和分子育种工作来促进作为进一步育种计划的潜在来源，以改善农艺学上重要的性状。