Identification of Drought-Tolerant Co-canes Based on Physiological Traits, Yield Attributes and Drought Tolerance Indices

Dhansu, Pooja; Kulshreshtha, Neeraj; Kumar, Ravinder; Raja, Arun Kumar; Pandey, Sandeep; Goel, Vishal; Ram, Bakshi

doi:10.1007/s12355-021-00967-7

Cited by 25 publications

(13 citation statements)

References 44 publications

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“…Drought stress disturbs physiological and biochemical processes i.e. damages photosynthetic apparatus and other enzymatic activities, which lead to reduction in crop yield (Dhansu et al 2021). Moisture deficit reduces photosynthesis due to decrease in leaf expansion, impaired photosynthetic machinery, premature leaf senescence and associated reduction in all yields (Wahid et al 2017).…”

Section: Resultsmentioning

confidence: 99%

Salicylic acid and thiourea mitigate salinity and drought stress in wheat (Triticum aestivum)

Yadav

Kumar

et al. 2022

Indian J Agri Sci

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Water and salinity stresses are the major environmental concerns limiting crop production, particularly in arid and semi-arid ecologies. Focused research is required to develop mitigating strategies to manage such stresses. Application of plant-bioregulators (PBRs) may be an effective option to manage water and salinity stresses. Therefore, a field experiment was conducted during 2016–17 and 2017–18 at semi-arid saline site of NW (north-western) India to assess the effectiveness of salicylic acid and thiourea in easing out the adverse effect of variable water deficit and irrigation water salinity regimes. Increasing water deficit and its salinity significantly (P<0.001) reduced all the studied growth parameters, viz. plant height, crop stand, no. of tillers, leaf area index and relative growth rate; and yield attributes like no. of effective tillers, spike length, grains/spike, grain weight/spike, 1000-grain weight, specific weight. Application of either salicylic acid or thiourea significantly improved growth parameters in comparison to control and thiourea proved more effective. Thiourea application improved grain yield by 3.96 and 17.36%, biological yield by 4.21 and 14.82%, effective no. of tillers by 3.77 and 11.91%, weight/spike by 2.83 and 15.17%, 1000-grain weight by 3.72 and 12.66% and specific weight by 2.04 and 8.84% compared to salicylic acid and control, respectively. This might be due to better nutrient uptake, water relations, enhanced CO2 fixation and effective partitioning of assimilates. Thus, thiourea and salicylic acid application in wheat found better as compared to control under saline water stress.

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Section: Resultsmentioning

confidence: 99%

Salicylic acid and thiourea mitigate salinity and drought stress in wheat (Triticum aestivum)

Yadav

Kumar

et al. 2022

Indian J Agri Sci

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“…Water plays an important role in the physiology of plants and maintaining higher leaf water content is the best strategy to mitigate salt stress [ 42 , 43 ]. Relative water content is a basic parameter that is commonly used as a physiological marker to screen out the tolerance for salinity stress.…”

Section: Discussionmentioning

confidence: 99%

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

Sanwal

Kumar

Kesh

et al. 2022

Plants

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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.

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“…Sugarcane, a C 4 plant, with a long life cycle is highly sensitive to water deficit and divided into four major phenophases, i.e., germination, formative/tillering, grand growth and maturity. Among these, the formative stage is considered as highly sensitive to drought stress [1,2] as it required 550 mm of rainfall [3], causing a significant reduction in cane yield up to 50% [4]. Water is the major constituent of cane and approximately 2.97 lakh ha of cane area is prone to the drought that distributed cellular osmotic balance, decreased turgor, inhibited photosynthesis, inhibition of enzyme activities and cellular processes, root architecture and morphology and leading to a reduction in yield [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Physiological and Molecular Adaptation of Sugarcane under Drought vis-a-vis Root System Traits

Dhansu¹,

Raja²,

Vengavasi³

et al. 2022

Drought - Impacts and Management

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Among various abiotic stresses, water is reported as a rare entity in many parts of the world. Decreased frequency of precipitation and global temperature rise will further aggravate the situation in future. Being C4 plant, sugarcane requires generous water for the proper growth. Plant root system primarily supports above-ground growth by anchoring in the soil and facilitates water and nutrients uptake from the soil. The plasticity and dynamic nature of roots endow plants for the uptake of vital nutrients from the soil even under soil moisture conditions. In sugarcane, the major part of root system are generally observed in the upper soil layers, while limited water availability shifts the root growth towards the lower soil layer to sustained water uptake. In addition, root traits are directly related to physiological traits of the shoot to cope up with water limited situations via reduction in stomatal conductance and an upsurge in density and deep root traits, adaptations at biochemical and molecular level which includes osmotic adjustment and ROS detoxification. Under stressed conditions, these complex interactive systems adjust homeo-statically to minimize the adverse impacts of stress and sustain balanced metabolism. Therefore, the present chapter deals with physiological and biochemical traits along with root traits that helps for better productivity of sugarcane under water-limited conditions.

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Identification of Drought-Tolerant Co-canes Based on Physiological Traits, Yield Attributes and Drought Tolerance Indices

Cited by 25 publications

References 44 publications

Salicylic acid and thiourea mitigate salinity and drought stress in wheat (Triticum aestivum)

Salicylic acid and thiourea mitigate salinity and drought stress in wheat (Triticum aestivum)

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

Physiological and Molecular Adaptation of Sugarcane under Drought vis-a-vis Root System Traits

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