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Salinity Stress Tolerance in Potato Cultivars: Evidence from Physiological and Biochemical Traits

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Title Salinity Stress Tolerance in Potato Cultivars: Evidence from Physiological and Biochemical Traits
Not Available
 
Creator Satish Kumar Sanwal
Parveen Kumar
Hari Kesh
Vijai Kishor Gupta
Arvind Kumar
Ashwani Kumar
Babu Lal Meena
Giuseppe Colla
Mariateresa Cardarelli
Pradeep Kumar
 
Subject Solanum tuberosum
salinity stress
antioxidant enzymes
oxidative stress
 
Description Not Available
Salinity stress is a major constraint to sustainable crop production due to its adverse impact
on crop growth, physiology, and productivity. As potato is the fourth most important staple food crop,
enhancing its productivity is necessary to ensure food security for the ever-increasing population.
Identification and cultivation of salt-tolerant potato genotypes are imperative mitigating strategies
to cope with stress conditions. For this purpose, fifty-three varieties of potato were screened under
control and salt stress conditions for growth and yield-related traits during 2020. Salt stress caused
a mean reduction of 14.49%, 8.88%, and 38.75% in plant height, stem numbers, and tuber yield,
respectively in comparison to control. Based on percent yield reduction, the genotypes were classified
as salt-tolerant (seven genotypes), moderately tolerant (thirty-seven genotypes), and salt-sensitive
genotypes (nine genotypes). Seven salt-tolerant and nine salt-sensitive genotypes were further
evaluated to study their responses to salinity on targeted physiological, biochemical, and ionic traits
during 2021. Salt stress significantly reduced the relative water content (RWC), membrane stability
index (MSI), photosynthesis rate (Pn), transpiration rate (E), stomatal conductance, and K+/Na+
ratio in all the sixteen genotypes; however, this reduction was more pronounced in salt-sensitive
genotypes compared to salt-tolerant ones. The better performance of salt-tolerant genotypes under
salt stress was due to the strong antioxidant defense system as evidenced by greater activity of super
oxide dismutase (SOD), peroxidase (POX), catalase (CAT), and ascorbate peroxidase (APX) and
better osmotic adjustment (accumulation of proline). The stepwise regression approach identified
plant height, stem numbers, relative water content, proline content, H2O2, POX, tuber K+/Na+, and
membrane stability index as predominant traits for tuber yield, suggesting their significant role in
alleviating salt stress. The identified salt-tolerant genotypes could be used in hybridization programs
for the development of new high-yielding and salt-tolerant breeding lines. Further, these genotypes
can be used to understand the genetic and molecular mechanism of salt tolerance in potato.
Not Available
 
Date 2023-04-07T08:31:12Z
2023-04-07T08:31:12Z
2022-07-14
 
Type Research Paper
 
Identifier Sanwal, S.K.; Kumar, P.; Kesh, H.; Gupta, V.K.; Kumar, A.; Kumar, A.; Meena, B.L.; Colla, G.; Cardarelli, M.; Kumar, P. Salinity Stress Tolerance in Potato Cultivars: Evidence from Physiological and Biochemical Traits. Plants 2022, 11, 1842.
2073-4395
http://krishi.icar.gov.in/jspui/handle/123456789/76770
 
Language English
 
Relation Not Available;
 
Publisher MDPI Basel