<p>A comprehensive evaluation of the performance of pomegranate genotypes against salt stress was carried out in a pot culture experiment to identify promising salt tolerant genotypes. The Salinity Tolerance Coefficients (STCs) for each parameter were used instead of absolute values for the analytical process. The F-values in the ANOVA analysis showed that genotype (G) and salinity (S) had a highly significant effect (<i>p</i> &lt; 0.001) on all traits, and the interaction (G × S) had a highly significant effect (<i>p</i> &lt; 0.001) on various traits studied, except for plant height, shoot dry weight, and root dry weight. The variability observed in proline content of the leaves was relatively uniform across all the examined pomegranate genotypes. Notably, the variability between control and saline conditions was consistent for the traits, including relative water content (RWC), membrane stability index (MSI), epicuticular wax content (ECW), stomatal width, and stomatal length. In contrast, stomatal density exhibited significant variability across all pomegranate genotypes. Persons’s correlation for the STCs of the traits have revealed that the plant height and total carotenoid content were found to be significantly and positively correlated, marking the highest correlation coefficient (r = 0.81) and significant at the one percent level of significance, followed by the ratio of chlorophyll a to chlorophyll b and total chlorophyll content, where r = 0.75. The PCA biplots revealed plant height had the highest positive correlation with the first principal component, followed by MSI, stomatal density, total chlorophyll content and ECW while stomatal width was negatively correlated. Among 12 wild, cultivated and exotic genotypes evaluated in this study, two genotypes namely Patna-5 and IC-318733 were emerged as salt tolerant with significantly better performance under saline conditions as compared to other genotypes.</p>

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Deciphering salt stress response of pomegranate genotypes (Punicagranatum L.): a comprehensive evaluation

  • Chandrakant Awachare,
  • Janhavi Pravin Patel,
  • Sebin Sara Solomon,
  • Pinky Raigond,
  • K. Dhinesh Babu,
  • Shilpa Parashuram,
  • Susheel Kumar Sarkar,
  • Mahesh Kumar,
  • C. T. Manjunath Prasad,
  • Rajiv Arvind Marathe,
  • Nripendra Vikram Singh

摘要

A comprehensive evaluation of the performance of pomegranate genotypes against salt stress was carried out in a pot culture experiment to identify promising salt tolerant genotypes. The Salinity Tolerance Coefficients (STCs) for each parameter were used instead of absolute values for the analytical process. The F-values in the ANOVA analysis showed that genotype (G) and salinity (S) had a highly significant effect (p < 0.001) on all traits, and the interaction (G × S) had a highly significant effect (p < 0.001) on various traits studied, except for plant height, shoot dry weight, and root dry weight. The variability observed in proline content of the leaves was relatively uniform across all the examined pomegranate genotypes. Notably, the variability between control and saline conditions was consistent for the traits, including relative water content (RWC), membrane stability index (MSI), epicuticular wax content (ECW), stomatal width, and stomatal length. In contrast, stomatal density exhibited significant variability across all pomegranate genotypes. Persons’s correlation for the STCs of the traits have revealed that the plant height and total carotenoid content were found to be significantly and positively correlated, marking the highest correlation coefficient (r = 0.81) and significant at the one percent level of significance, followed by the ratio of chlorophyll a to chlorophyll b and total chlorophyll content, where r = 0.75. The PCA biplots revealed plant height had the highest positive correlation with the first principal component, followed by MSI, stomatal density, total chlorophyll content and ECW while stomatal width was negatively correlated. Among 12 wild, cultivated and exotic genotypes evaluated in this study, two genotypes namely Patna-5 and IC-318733 were emerged as salt tolerant with significantly better performance under saline conditions as compared to other genotypes.