Physiological responses of two halophytic grass species under drought stress environment

Siddiqui, Zamin Shaheed; Shahid, Huda; Cho, Jung‐Il; Park, Sung-Han; Ryu, Tae-Hun; Park, Soo-Chul

doi:10.1515/botcro-2016-0018

Cited by 15 publications

(16 citation statements)

References 42 publications

(45 reference statements)

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“…In this study, physiological and biochemical parameters used in the screening of salt or drought stress were selected (Siddiqui et al 2016) and their correlations are presented. This approach may be useful to identify physiologically tolerant genotypes of sunflower under water limited, salinity prone and combined stress environments.…”

Section: Introductionmentioning

confidence: 99%

Physiological performance of sunflower genotypes under combined salt and drought stress environment

Umar¹,

Siddiqui²

2018

Acta Botanica Croatica

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The physiological performance of some sunflower genotypes (S.28111, SF0049, Hysun-33, Hysun-39) under salt, drought stress separately and in combination was examined. Salt, drought and a combination of these stresses were applied to plants by gradual increments. The plants were exposed to stress for two weeks. Relative water content, osmotic potential, stomatal conductance, performance index, dark adapted quantum yield and chlorophyll contents were reduced upon salinity and drought stresses. However, when plants were subjected to a combination of these stresses, a greater reduction in all tested attributes was observed. Proline and carotenoid contents in drought stress were elevated compared to salt stress. Superoxide dismutase (SOD) and catalase (CAT) showed the highest activity in individual salt and drought stress with less accumulation of H2O2. Combined stress reduced the activity of antioxidant enzymes which ultimately decreased the physiological performance of sunflower plants. However, among the tested genotypes, S.28111 and SF0049 were found to be more tolerant to drought, salt and combined stress than both Hysun genotypes. The physiological performance of genotypes against salinity and drought individually and in combination is discussed in detail.

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Section: Introductionmentioning

confidence: 99%

Physiological performance of sunflower genotypes under combined salt and drought stress environment

Umar¹,

Siddiqui²

2018

Acta Botanica Croatica

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“…Antioxidant enzyme activity was higher in S. bungeana than in the other species, which indicated that S. bungeana had strong drought resistance. The Pro level was higher in A. frigida than in other species, which indicated that A. frigida was more tolerant to water stress and had higher drought resistance (Siddiqui et al, ). The drought resistance index ( D ) indicated that the drought resistance ranks of the four species in decreasing order were S. bungeana > A. frigida > H. altaicus > L. davurica , which was basically consistent with the field species distribution data in plant communities.…”

Section: Discussionmentioning

confidence: 99%

“…The Pro level was higher in A. frigida than in other species, which indicated that A. frigida was more tolerant to water stress and had higher drought resistance (Siddiqui et al, 2016 (Cai et al, 2018). At the initial stage after cropland abandonment, community coverage and transpiration were low, and soil water was relatively high, especially in the deep layer in sandy soil.…”

Section: Drought Resistance Of the Four Species And Implicationsmentioning

confidence: 93%

Changes in levels of enzymes and osmotic adjustment compounds in key species and their relevance to vegetation succession in abandoned croplands of a semiarid sandy region

Liu

Lai

Zhou

et al. 2020

Ecology and Evolution

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Reclamation of cropland from grassland is regarded as a main reason for grassland degradation; understanding succession from abandoned cropland to grassland is thus crucial for vegetation restoration in arid and semiarid areas. Soil becomes dry when cropland is reverted to grassland, and enzyme and osmotic adjustment compounds may help plants to adapt to a drying environment. Croplands that were abandoned in various years on the Ordos Plateau in China, were selected for the analysis of the dynamics of enzymes and osmotic adjustment compounds in plant species during vegetation succession. With increasing number of years since abandonment, levels of superoxide dismutase increased in Stipa bungeana, first decreased and then increased in Lespedeza davurica and Artemisia frigida, and fluctuated in Heteropappus altaicus. Levels of peroxidase and catalase in the four species fluctuated; levels of proline, soluble sugar, and soluble protein either decreased or first increased and then generally decreased. According to a drought resistance index, the drought resistance of the four species was ranked in descending order as follows: S. bungeana > A. frigida > H. altaicus > L. davurica. The drought resistance ability of the different species was closely linked with vegetation succession from communities dominated by annual and biennial species (with main accompanying species of L. davurica and H. altaicus) to communities dominated by perennial species (S. bungeana and A. frigida) when soil became dry owing to increasing evapotranspiration after cropland abandonment. The restoration of S. bungeana steppe after cropland abandonment on the Ordos Plateau is recommended both as high‐quality forage and for environmental sustainability.

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“…Increased CAR content may be due to protection from oxidative damage under drought stress (Filippou, Antoniou, & Fotopoulos, 2011;Man, Bao, & Han, 2011). Decline in RWC is related to cell membrane properties and its adaptability to drought stress (Chai, Jin, Merewitz, & Huang, 2010;Siddiqui et al, 2016).…”

Section: Discussionmentioning

confidence: 99%

Genotype selection for physiological responses of drought tolerance using molecular markers in polycross hybrids of orchardgrass

2019

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The present study aimed to assess the effect of contrasting levels of molecular and phenotypic diversity among polycross parents of orchardgrass on the performance of synthetic progeny with respect to physiological responses and drought tolerance. Four polycross groups each composed of six parental plants were evaluated under normal irrigation and drought stress conditions. A number of 923 inter simple sequence repeats and sequence related amplified polymorphism markers and several phenotypic traits were used to select contrasting levels of diversity (high and low) in parental genotypes. Highly significant correlation was observed between molecular distance and progeny performances at both normal irrigation and drought stress conditions. High molecular diversity among polycross parents led to a significant yield advantage of first generation progeny with averages of 34.40% for normal irrigation and 48.10% for drought stress conditions. Also crosses between genetically distant parents produced progeny with considerable drought tolerance and yield stability. Positive associations between phenotypic distance of parents and progeny performance were found for most physiological traits at both moisture regimes but phenotypic distances had weak association with forage yield, stress tolerance index and yield stability of progeny. Significant associations between drought tolerance index and some physiological traits confirmed the importance of these traits in conferring drought tolerance of orchardgrass. Our results underscore the effectiveness of marker‐assisted polycross breeding to improve drought tolerance and yield stability through physiological traits in orchardgrass.

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Physiological responses of two halophytic grass species under drought stress environment

Cited by 15 publications

References 42 publications

Physiological performance of sunflower genotypes under combined salt and drought stress environment

Physiological performance of sunflower genotypes under combined salt and drought stress environment

Changes in levels of enzymes and osmotic adjustment compounds in key species and their relevance to vegetation succession in abandoned croplands of a semiarid sandy region

Genotype selection for physiological responses of drought tolerance using molecular markers in polycross hybrids of orchardgrass

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