Soil salinity as a selection pressure is a key determinant for the evolution of salt tolerance in Blue Panicgrass (Panicum antidotale Retz.)

Ahmad, Muhammad Sajid Aqeel; Ashraf, Muhammad; Ali, Shafaqat

doi:10.1016/j.flora.2008.12.002

Cited by 48 publications

(36 citation statements)

References 29 publications

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“…The decrease in growth is in accordance with the studies on Salsola villosa (Assaeed 2001) and Panicum antidotale (Ahmad, Ashraf, et al 2010). Delay in plant growth under saline conditions was attributed to decrease in osmotic potential of the soil solution consequently and water uptake by plant root (Rasool, Hameed, et al 2013).…”

Section: Discussionsupporting

confidence: 88%

“…The contributions of these antioxidants against salt stress is also reported by Nounjan et al (2012) in rice, Rasool, Ahmad, et al (2013) in chickpea, Ahmad, Ashraf, et al (2010), Ahmad, Jaleel, Salem, et al (2010) and in mulberry, and Ahmad et al (2012) in mustard. Generally, accumulation of antioxidants plays an important role in regulating the oxidative stress and ROS production during the growth under salt-stress conditions (Rasool, Hameed, et al 2013).…”

Section: Discussionmentioning

confidence: 63%

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Alleviation of salt-induced adverse impact via mycorrhizal fungi inEphedra aphyllaForssk

Alqarawi

2014

Journal of Plant Interactions

143

104

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The current investigation was carried out to examine the role of arbuscular mycorrhizal fungi (AMF) in alleviating adverse effects of salt stress in Ephedra aphylla. The plants were exposed to 75 and 150 mM sodium chloride (NaCl) stress with and without application of AMF. Salt stress caused significant decrease in chlorophyll and carotenoid contents; however, the application of AMF restored the pigments content in salt-affected plants. Proline, phenols, and lipid peroxidation were increased with increasing concentration of NaCl, but lower accumulation has been reported in plants treated with AMF. NaCl stress also showed increase in different antioxidant enzymes activities (catalase, ascorbate peroxidase, peroxidase, glutathione reductase, and superoxide dismutase), and further increase was observed in plants treated with AMF. The nutrient uptake, Na + and Na/K ratio increased and potassium and phosphorus were decreased with increasing concentration of NaCl in the present study. However, the colonization with AMF significantly increased K + and P and reduced Na + uptake. It is concluded that presown soil treatment with AMF reduced severity of salt stress in E. aphylla through alterations in physiological parameters, antioxidants and uptake of nutrients.Keywords: arbuscular mycorrhizal fungi; Ephedra aphylla; salinity; antioxidant enzymes; ion accumulation IntroductionDesertification or the disappearance of vegetation from arid land is an increasing problem worldwide including Saudi Arabia (SA). Abiotic stress leads to loss of natural resources such as plant biomass, biodiversity, and imparts a great role in global warming. Among the abiotic stresses, salinity is one of the main factor that contributes to desertification of arid lands. Soil salinization has become a great challenge for rehabilitation of range lands and plant productivity (Alqarawi et al. 2014). Salinity not only reduces yield of plants but also disrupts the ecological balance of the area. Stress tolerance of plants is a complex phenomenon involving changes at morphological, physiological, biochemical, and molecular levels and are undoubtedly the most important response of plants to the adverse environmental conditions (Rasool, Hameed, et al. 2013;Shaheen et al. 2013;Ahmad et al. 2014;Alqarawi et al. 2014). Salinity causes nutritional disorders in plants which lead to deficiencies of several nutrients and drastically increasing Na + levels in the plant cells (Iqbal & Ashraf 2013). The adverse effects of salt stress causes imbalance in the synthesis of endogenous plant growth regulators (PGR), hence a number of changes take place which disturb growth and physiological processes such as plant cell permeability, respiration, energy transport, and photosynthesis in plant cells (Ahmad et al. 2012;Iqbal & Ashraf 2013). Moreover, the salt stress also causes oxidative stress through the generation of reactive oxygen species (ROS), such as hydrogen peroxide, superoxide ions, singlet oxygen, and hydroxyl radical. These ROS cause deleterious effects on mitoc...

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Section: Discussionsupporting

confidence: 88%

Section: Discussionmentioning

confidence: 63%

Alleviation of salt-induced adverse impact via mycorrhizal fungi inEphedra aphyllaForssk

Alqarawi

2014

Journal of Plant Interactions

143

104

View full text Add to dashboard Cite

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“…The accumulation of MDA and H2O2 represents the aggravation of stress in plant and suppresses plant growth (Ahmad et al, 2010(Ahmad et al, , 2012. In the present study, the MDA content increased at all NaCl concentrations but increased more at NaCl concentration of 100 mM (Table 1).…”

Section: Discussionmentioning

confidence: 99%

Arbuscular Mycorrhizal Fungi Improve the Antioxidative Response and the Seed Production of Suaedoideae Species Suaeda physophora Pall Under Salt Stress

Yang

Yu²,

Zhang

et al. 2016

Not Bot Horti Agrobo

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Arbuscular mycorrhizal fungi (AMF) play a key role in plant growth and survival; however, the influence of AMF on the growth and production of Suaedoideae species is still not well understood. The object of this study was to understand the mechanism of AMF that affects the growth of Suaedoideae species under different saline conditions. The result showed that the Suaedoideae species Suaeda physophora was colonized by the AMF species Glomus etunicatum (Ge) and Glomus mosseae (Gm). AMF significantly increased the activities of superoxide dismutase (SOD) and peroxidase (POD) in S. physophora and reduced the concentrations of malondialdehyde (MDA) and H 2 O 2 in the leaves of S. physophora under salt stress. AMF also improved the aboveground biomass of S. physophora and significantly increased its seed numbers. Moreover, AMF increased the aboveground phosphorus (P) content of S. physophora. No significant difference between the effect of AMF species Ge and Gm on S. physophora growth was observed. These results suggest that AMF can increase the salt resistance of the Suaedoideae species S. physophora by increasing SOD and POD activities, reducing MDA and H 2 O 2 concentrations and increasing P uptake. The results highlight that AMF might play an important role in S. physophora growth and population survival under harsh salt conditions.

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“…Salt often leads to oxidative stress in plants, and reactive oxygen species (ROS) generated as a result of oxidative stress are highly deleterious for plants (Ahmad et al 2012). The structure and function of biomolecules such as membrane lipids, proteins and nucleic acids may be destroyed by ROS Ahmad et al 2010aAhmad et al , 2010b, and a high concentration of ROS causes the death of the plant. Nonetheless, plants have mechanisms to counteract the deleterious effects of ROS (Rama Devi and Prasad 1998) through the generation of osmolytes or antioxidants (Ashraf and Foolad 2007;Ahmad 2008;Ahmad et al 2010a).…”

Section: Introductionmentioning

confidence: 99%

Salt tolerance conferred by expression of a global regulator IrrE from Deinococcus radiodurans in oilseed rape

et al. 2016

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As salinity is a major threat to sustainable agriculture worldwide, cultivation of salt-tolerant crops becomes increasingly important. IrrE acts as a global regulator and a general switch for stress resistance in Deinococcus radiodurans. In this study, to determine whether the irrE gene can improve the salt tolerance of Brassica napus, we introduced the irrE gene into B. napus by the Agrobacterium tumefaciens-mediated transformation method. Fortytwo independent transgenic plants were regenerated. Polymerase chain reaction (PCR) analyses confirmed that the irrE gene had integrated into the plant genome. Northern as well as Western blot analyses revealed that the transgene was expressed at various levels in transgenic plants. Analysis for the T 1 progenies derived from four independent transformants showed that irrE had enhanced the salt tolerance of T 1 in the presence of 350 mM NaCl. Furthermore, under salt stress, transgenic plants accumulated more compatible solutes (proline) and a lower level of malondialdehyde (MDA), and they had higher activities of catalase (CAT), peroxidase (POD) and superoxide dismutase (SOD). However, agronomic traits were not affected by irrE gene overexpression in the transgenic B. napus plants. This study indicates that the irrE gene can improve the salt tolerance of B. napus and represents a promising candidate for the development of crops with enhanced salt tolerance by genetic engineering.

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Soil salinity as a selection pressure is a key determinant for the evolution of salt tolerance in Blue Panicgrass (Panicum antidotale Retz.)

Cited by 48 publications

References 29 publications

Alleviation of salt-induced adverse impact via mycorrhizal fungi inEphedra aphyllaForssk

Alleviation of salt-induced adverse impact via mycorrhizal fungi inEphedra aphyllaForssk

Arbuscular Mycorrhizal Fungi Improve the Antioxidative Response and the Seed Production of Suaedoideae Species Suaeda physophora Pall Under Salt Stress

Salt tolerance conferred by expression of a global regulator IrrE from Deinococcus radiodurans in oilseed rape

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