Growth and Solute Composition in Two Wheat Species Experiencing Combined Influence of Stress Conditions<sup>1</sup>

Keleş, Yüksel; Öncel, Işıl

doi:10.1023/b:rupp.0000019215.20500.6e

Cited by 43 publications

(24 citation statements)

References 21 publications

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“…These compounds can act as antioxidant, quencher or scavenger of ROS in plants (Solecka 1997). Similar results related to enhanced phenolics level were obtained from Cakile maritima (Ksouri et al 2007), wheat (Keles and Oncel 2004), strawberry (Keutgen and Pawelzik 2008) and Bravia parriflora (Parida and Das 2005). However, a decrease in phenolic compounds has also been reported in pepper plants under salinity conditions (Navarro et al 2006).…”

Section: Discussionsupporting

confidence: 82%

Physiological responses to NaCl stress in three wild species of potato in vitro

2009

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In this study, responses of wild species of potato to NaCl stress were investigated in vitro. In S. stoloniferum and S. bulbosum, length of the shoot, fresh and dry weight, photosynthetic pigments, K ? concentration, K ? /Na ? ratio, ascorbate pool, anthocyanin, and phenolic and flavonoid compounds were decreased in response to salinity. In these species, salinity increased the level of Na ? , lipid peroxidation, proline and ion leakage percentage. In S. acaule, the length of the shoot, and fresh and dry weight were not affected by salinity. Photosynthetic pigments, Na ? concentration, proline, flavonoid and phenolic compounds quantities were increased and K ? /Na ? ratio were decreased. K ? concentration, lipid peroxidation, ascorbate pool, anthocyanin and ion leakage were not changed by NaCl stress. Superoxide dismutase, guaiacol peroxidase, ascorbate peroxidase and catalase activities were increased in all species. The results suggest that the non-enzymatic antioxidant capacity in S. acaule (salt tolerant) is more important than the enzymatic antioxidant capacity in comparison with the other species.

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Section: Discussionsupporting

confidence: 82%

Physiological responses to NaCl stress in three wild species of potato in vitro

2009

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“…Although plant species can differ considerably in their ability to accumulate proline upon stress, there is no clear relationship between this ability and stress tolerance among species (Maggio et al 2002). Keles and Oncel (2004) found high relative water content (RWC) to be closely related to drought tolerance. Efforts are currently directed to access new, affordable, and reliable indices to help in the selection of drought tolerant genotypes (Hura et al 2007).…”

Section: Introductionmentioning

confidence: 98%

Root and physiological characteristics associated with drought tolerance in Iranian tall fescue

2014

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Research on crop response to deficit irrigation is important to reduce agricultural water use in areas where water is a limited resource. The objective of this study was to evaluate changes in physiological and root traits under mild and intense drought stress in tall fescue. It also sought to find associations between these changes and field drought tolerance. A total of 24 tall fescue genotypes were selected from a wide polycross population and assessed for field drought tolerance during 2011-2012 in the field. The genotypes were classified as tolerant, moderately tolerant, and susceptible based on drought stress tolerance index (STI), tolerance index (TOL), and yield reduction (YR). In 2013, 24 genotypes were clonally propagated and planted in polyvinylchloride (PVC) tubes under, three levels of moisture regimes. Root characteristics were investigated at 0-30 and 30-60 cm depths of soil. Also 11 physiological traits, dry forage yield, STI, TOL, and YR were recorded. At the 30-60 cm depths of soil, the root length increased by 5.95 and 7.30 % under mild and intense stress, respectively. Under mild stress, root area and root volume were positively correlated with STI. Consequences of drought stress, manifested as declined relative water content and chlorophyll, could be associated with a decrease in the activity of antioxidant enzymes. Some tall fescue genotypes had extensive root systems, high photosynthetic capacity, and less YR in the field. These genotypes may adapt to drought through drought avoidance and drought tolerance mechanisms. The application of principle component analysis for screening suitable genotypes was also discussed.

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“…One of the most serious problems encountered in semiarid and arid climatic regions is the lack of water to obtain sufficient yield from crop plants. High relative water content (RWC) and low excised-leaf water loss (RWL) were related to drought resistance, and these parameters have also been proposed as more important indicators of water status than the other water potential parameters under drought stress [6][7][8]. Such effects may include reduction of growth, decrease in chlorophyll, increase in hydrogen peroxide, which causes lipid peroxidation and consequently membrane injury, increases in ascorbic acid and proline concentrations [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

10.1007/s11183-008-1007-2

2010

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Drought is one of the most important factors limiting chickpea production in arid and semi-arid regions. There is little information regarding genotypic variation for drought tolerance in chickpea cultivars. Screening for drought tolerance is very important. It is essential to identify the physiological mechanisms of drought tolerance to complete conventional breeding program. Glasshouse experiment was carried out to study the genotypic variation among 11 chickpea ( Cicer arietinum L.) cultivars. Plants were grown either under optimum conditions or drought stress was implemented at pre-or post-anthesis stages. The drought susceptibility index (DSI) was used as the measure of drought tolerance. Relationships between DSI and excised-leaf water loss (RWL), relative water content (RWC), membrane permeability, ascorbic acid, proline, and chlorophyll contents, lipid peroxidation, and hydrogen peroxide concentrations were determined in order to find out whether these physiological parameters could be used as the genotypic selection criteria for drought tolerance. The results of this study indicated that there was a wide variation in tolerance to drought stress among the chickpea cultivars, which could be exploited in breeding new chickpea cultivars with high drought tolerance. The results also demonstrated that drought-tolerant cultivars had a higher RWC, ascorbic acid and proline concentrations, but lower RWL and membrane permeability in comparison to drought-sensitive cultivars. The significant and a well defined relationships between DSI and RWC, RWL, ascorbic acid, proline, and membrane permeability were found. It was concluded that these parameters could be instrumental in predicting the drought tolerance of chickpea cultivars.

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Growth and Solute Composition in Two Wheat Species Experiencing Combined Influence of Stress Conditions¹

Cited by 43 publications

References 21 publications

Physiological responses to NaCl stress in three wild species of potato in vitro

Physiological responses to NaCl stress in three wild species of potato in vitro

Root and physiological characteristics associated with drought tolerance in Iranian tall fescue

10.1007/s11183-008-1007-2

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Growth and Solute Composition in Two Wheat Species Experiencing Combined Influence of Stress Conditions1

Cited by 43 publications

References 21 publications

Physiological responses to NaCl stress in three wild species of potato in vitro

Physiological responses to NaCl stress in three wild species of potato in vitro

Root and physiological characteristics associated with drought tolerance in Iranian tall fescue

10.1007/s11183-008-1007-2

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Growth and Solute Composition in Two Wheat Species Experiencing Combined Influence of Stress Conditions¹