Drought Tolerance in Chickpea as Evaluated by Root Characteristics, Plant Water Status, Membrane Integrity and Chlorophyll Fluorescence Techniques

Kumar, Neeraj; Nandwal, A. S.; Waldia, R. S.; Singh, Samunder; Devi, Sushma; Sharma, K. D.

doi:10.1017/s0014479712000063

Cited by 22 publications

(27 citation statements)

References 11 publications

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“…However, in another experiment within the same study, the yield reduction caused by water stress was less severe, and there was no significant relationship between root length density and seed yield. Similar results were recently obtained in lentils, where root traits and grain yield were not significantly related in a rain-fed situation (Kumar et al 2012). Ratnakumar and Vadez (2011) compared the root systems of 20 groundnut genotypes with variable yields under a range of water stress conditions and showed that the yield differences under stress were not related to differences in rooting depth or root length density at different depths.…”

Section: Usual Assumptions About Roots Under Water-limited Conditionssupporting

confidence: 82%

Water: the most important ‘molecular’ component of water stress tolerance research

Vadez

Kholová

Zaman-Allah

et al. 2013

Functional Plant Biol.

104

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Abstract. Water deficit is the main yield-limiting factor across the Asian and African semiarid tropics and a basic consideration when developing crop cultivars for water-limited conditions is to ensure that crop water demand matches season water supply. Conventional breeding has contributed to the development of varieties that are better adapted to water stress, such as early maturing cultivars that match water supply and demand and then escape terminal water stress. However, an optimisation of this match is possible. Also, further progress in breeding varieties that cope with water stress is hampered by the typically large genotype Â environment interactions in most field studies. Therefore, a more comprehensive approach is required to revitalise the development of materials that are adapted to water stress. In the past two decades, transgenic and candidate gene approaches have been proposed for improving crop productivity under water stress, but have had limited real success. The major drawback of these approaches has been their failure to consider realistic water limitations and their link to yield when designing biotechnological experiments. Although the genes are many, the plant traits contributing to crop adaptation to water limitation are few and revolve around the critical need to match water supply and demand. We focus here on the genetic aspects of this, although we acknowledge that crop management options also have a role to play. These traits are related in part to increased, better or more conservative uses of soil water. However, the traits themselves are highly dynamic during crop development: they interact with each other and with the environment. Hence, success in breeding cultivars that are more resilient under water stress requires an understanding of plant traits affecting yield under water deficit as well as an understanding of their mutual and environmental interactions. Given that the phenotypic evaluation of germplasm/breeding material is limited by the number of locations and years of testing, crop simulation modelling then becomes a powerful tool for navigating the complexity of biological systems, for predicting the effects on yield and for determining the probability of success of specific traits or trait combinations across water stress scenarios.

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Section: Usual Assumptions About Roots Under Water-limited Conditionssupporting

confidence: 82%

Water: the most important ‘molecular’ component of water stress tolerance research

Vadez

Kholová

Zaman-Allah

et al. 2013

Functional Plant Biol.

104

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“…The observed significant decrease in RLWC under moisture stressed condition (12 and 10% decrease at 105 DAS during summer and winter) was due to reduced absorption of water from the soil and inability to control water loss through the stomata. Similar results were reported by Kumar et al (2012); Ananthi et al (2013). Among the moisture stress management practices, application of Prosopis biochar+crop residue mulch at 5 t ha -1 +foliar application of PPFM at 500 ml ha -1 at 75 and 90 DAS (B 6 ) recorded higher RLWC (74.7 and 77.3% at 105 DAS) during summer and winter seasons.…”

Section: Relative Leaf Water Contentsupporting

confidence: 85%

Influence of Biochar, Mulch and PPFM on Stress Physiological Parameters of Cotton under Moisture Stressed Condition

Kannan¹,

Srinivasan²,

Sivakumar³

2019

IJBSM

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Biochar, relative water content, chlorophyll stability index, proline Keywords:The field experiments were conducted at Agricultural College and Research Institute, Madurai during summer and winter irrigated cotton seasons of 2016 and 2016-17. Experiments were laid out in split plot design with three replications. Moisture regimes were assigned to the main plots viz., Irrigation at IW/CPE ratio 0.4 and 0.8. The subplot comprises with moisture stress management practices viz., Cotton stalk biochar @ 5 t ha -1 , Cotton stalk biochar @ 5 t ha -1 +Crop residue mulch @ 5 t ha -1 , Cotton stalk biochar @ 5 t ha -1 +Crop residue mulch @ 5 t ha -1 and PPFM @ 500 ml ha -1 on 75 and 90 DAS, Prosopis biochar @ 5 t ha -1 , Prosopis biochar @ 5 t ha -1 +Crop residue mulch @ 5 t ha -1 , Prosopis biochar @ 5 t ha -1 +crop residue mulch @ 5 t ha -1 and PPFM @ 500 ml ha -1 on 75 and 90 DAS and Control. The stress physiological parameters observed viz., Relative leaf water content, Chlorophyll stability index and Leaf accumulated proline were greatly influenced during moisture stress period. The Maintenance of higher relative water content helps in sustaining the photosynthetic capacity of plants which ultimately contributes to higher yield. In this study higher relative leaf water content, chlorophyll stability index, lower leaf accumulated proline and higher yield of cotton was recorded in irrigation at IW/CPE to 0.8 and Prosopis biochar @ 5 t ha -1 +crop residue mulch @ 5 t ha -1 and PPFM @ 500 ml ha -1 . Abstract V. Kannan

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“…Relatively lower canopy temperature in drought stressed crop plants indicates a relatively better capacity for taking up soil moisture and for maintaining a relatively better plant water status. The photosynthetic efficiency, transpiration and the values of relative stress injury declined in chickpea under drought conditions [97]. Photosynthetic pigments play an important role in light harvesting and dissipation of excess energy.…”

Section: Relative Stress Injury Ctd and Photochemical Efficiencymentioning

confidence: 99%

Molecular and Morphophysiological Analysis of Drought Stress in Plants

Yadav¹,

Sharma²

2016

Plant Growth

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Drought is a major environmental stress factor that affects the growth and development of plants. Most of the physiological traits associated with drought tolerance are quantitative in nature. An important research strategy that has been widely used to deal with such complexity is to use molecular markers to identify quantitative trait loci (QTLs) in appropriate mapping populations. In response to drought brought about by soil water deficit, plants can exhibit either drought escape or drought resistance mechanisms, with resistance further classified into drought avoidance and drought tolerance. Drought escape is the ability of plants to complete the life cycle before severe stress arrives. Drought avoidance is the maintenance of high tissue water potential in spite of soil water deficit. Drought avoidance is consequence of improved water uptake under stress and the capacity of plant cells to hold acquired water that reduces water loss. Drought tolerance is the ability to withstand water deficit with low tissue water potential. Plant water status that includes leaf water potential, osmotic potential and relative water content (RWC) represents an easy measure of water deficit and provides best sensor for stress. Genomics-assisted breeding (GAB) approaches, such as markerassisted selection (MAS), can greatly improve precision and efficiency of selection in crop breeding. Molecular markers can facilitate indirect selection for traits that are difficult or inconvenient to score directly, pyramiding genes from different sources and combining resistance to multiple stresses. Conventional breeding for developing drought-tolerant crop varieties is time-consuming and labor intensive due to the quantitative nature of drought tolerance and difficulties in selection for drought tolerance. The identification of genomic regions associated with drought tolerance would enable breeders to develop improved cultivars with increased drought tolerance using marker-assisted selection (MAS). This requires integration of knowledge from plant physiology and biotechnology into plant breeding. The availability of a large number of molecular markers, dense genetic maps and markers associated with traits and transcriptomics resources have made it possible to integrate genomics technologies into chickpea improvement.

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Drought Tolerance in Chickpea as Evaluated by Root Characteristics, Plant Water Status, Membrane Integrity and Chlorophyll Fluorescence Techniques

Cited by 22 publications

References 11 publications

Water: the most important ‘molecular’ component of water stress tolerance research

Water: the most important ‘molecular’ component of water stress tolerance research

Influence of Biochar, Mulch and PPFM on Stress Physiological Parameters of Cotton under Moisture Stressed Condition

Molecular and Morphophysiological Analysis of Drought Stress in Plants

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