Overexpression of a tonoplast Na+/H+ antiporter from the halophytic shrub Nitraria sibirica improved salt tolerance and root development in transgenic poplar

Geng, Xin; Chen, Shouye; Yilan, E; Zhang, Wenbo; Mao, Huiping; qiqige, Alatan; Wang, Yingchun; Qi, Zhi; Lin, Xiaofei

doi:10.1007/s11295-020-01475-7

Cited by 12 publications

(4 citation statements)

References 39 publications

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“…Most of these genes encode antiporters, ion transporters, ROS scavengers, antioxidants, and proteins that play crucial roles in plants′ signal transduction and functional stabilization [ 149 , 150 ]. For example, transgenic poplar plant ectopically expressing a N. sibirica vacuolar Na + /H + antiporter gene ( NsNHX1 ) displayed a more remarkable improvement in salt tolerance through improved compartmentalization of Na + , more efficient photosynthesis, greater activity of antioxidant enzymes, and enhanced osmotic adjustment [ 151 ] ( Table 2 ). Ectopic overexpression of a high-affinity K + transporter-encoding gene, SbHKT1 , from S. bigelovii in cotton improved salt tolerance of transgenic plants by enhancing K + uptake capacity, K + /Na + homeostasis, and the scavenging of ROS through increased activities of antioxidant enzymes, including SOD, POD, and CAT [ 152 ].…”

Section: Potential Of Halophytes As Genetic Resources For the Engineering Of Crops With Improved Salt Tolerancementioning

confidence: 99%

Adaptive Mechanisms of Halophytes and Their Potential in Improving Salinity Tolerance in Plants

Rahman

Mostofa

Keya

et al. 2021

IJMS

111

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Soil salinization, which is aggravated by climate change and inappropriate anthropogenic activities, has emerged as a serious environmental problem, threatening sustainable agriculture and future food security. Although there has been considerable progress in developing crop varieties by introducing salt tolerance-associated traits, most crop cultivars grown in saline soils still exhibit a decline in yield, necessitating the search for alternatives. Halophytes, with their intrinsic salt tolerance characteristics, are known to have great potential in rehabilitating salt-contaminated soils to support plant growth in saline soils by employing various strategies, including phytoremediation. In addition, the recent identification and characterization of salt tolerance-related genes encoding signaling components from halophytes, which are naturally grown under high salinity, have paved the way for the development of transgenic crops with improved salt tolerance. In this review, we aim to provide a comprehensive update on salinity-induced negative effects on soils and plants, including alterations of physicochemical properties in soils, and changes in physiological and biochemical processes and ion disparities in plants. We also review the physiological and biochemical adaptation strategies that help halophytes grow and survive in salinity-affected areas. Furthermore, we illustrate the halophyte-mediated phytoremediation process in salinity-affected areas, as well as their potential impacts on soil properties. Importantly, based on the recent findings on salt tolerance mechanisms in halophytes, we also comprehensively discuss the potential of improving salt tolerance in crop plants by introducing candidate genes related to antiporters, ion transporters, antioxidants, and defense proteins from halophytes for conserving sustainable agriculture in salinity-prone areas.

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Section: Potential Of Halophytes As Genetic Resources For the Engineering Of Crops With Improved Salt Tolerancementioning

confidence: 99%

Adaptive Mechanisms of Halophytes and Their Potential in Improving Salinity Tolerance in Plants

Rahman

Mostofa

Keya

et al. 2021

IJMS

111

View full text Add to dashboard Cite

show abstract

“…The expression of NHX can improve plant salt tolerance without a significant effect on fruit development. The overexpression of AtNHX1 in rapeseed can increase the transgenic lines growth under 200 mM NaCl, and high salinity soil did not affect seed yield and oil quality [46]. The overexpression of AtNHX1 in tomato made the transgenic lines grow, bloom and bear fruit normally under 200 mM without effect on the quality of tomato fruits [47].…”

Section: Discussionmentioning

confidence: 97%

Overexpression of HaASR1 from a Desert Shrub, Haloxylon ammodendron, Improved Salt Tolerance of Arabidopsis thaliana

Lü

Gao

et al. 2023

Agronomy

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Salt stress causes reduced plant growth and alters the plant development process, resulting in a threat to global crop production. The exploring of unique genes conferring to salt tolerance from plants that inhabit extreme environments remains urgent. Haloxylon ammodendron is a desert xero-halophyte shrub with a strong tolerance to drought and salt stresses. We previously reported that the drought tolerance of Arabidopsis thaliana was improved by the overexpression of HaASR1 from H. ammodendron. In this work, the effects of HaASR1 overexpression on the salt tolerance of Arabidopsis were investigated. HaASR1 overexpression significantly enhanced the growth of Arabidopsis lines under salinity and plant tissue water content through enhancing the osmotic adjustment ability, maintaining the membrane integrity, improving the chlorophyll content and leaf area, and thereby enhancing photosynthesis capacity. Taken together, the overexpression of HaASR1 from H. ammodendron improved the salt tolerance of the transgenic lines of Arabidopsis. These results indicated that HaASR1 from H. ammodendron has potential application values in increasing the salt tolerance of grass and crop plants by genetic engineering.

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“…Overexpression of PvLBD12 enhanced salt tolerance by altering a wide range of physiological responses like increased proline accumulation, reduced malondialdehyde production, improved K + accumulation, and reduced Na + absorption in switchgrass ( Panicum virgatum L.) ( Guan et al., 2023 ). Recently, the antiporter NsNHX1 gene from the halophyte Nitraria sibirica has been used for better plant growth and salinity tolerance in the tree species poplar through improved ion homeostasis, osmoregulation, increased photosynthetic efficiency ( Geng et al., 2020 ) and, hence, better tree growth under salinity. Thus, halophytes can be explored to enhance the salt stress tolerance of plant species in a broader way.…”

Section: Halophytic Genes As a Source Of Salt Tolerancementioning

confidence: 99%

Halophytes as new model plant species for salt tolerance strategies

et al. 2023

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Soil salinity is becoming a growing issue nowadays, severely affecting the world’s most productive agricultural landscapes. With intersecting and competitive challenges of shrinking agricultural lands and increasing demand for food, there is an emerging need to build resilience for adaptation to anticipated climate change and land degradation. This necessitates the deep decoding of a gene pool of crop plant wild relatives which can be accomplished through salt-tolerant species, such as halophytes, in order to reveal the underlying regulatory mechanisms. Halophytes are generally defined as plants able to survive and complete their life cycle in highly saline environments of at least 200-500 mM of salt solution. The primary criterion for identifying salt-tolerant grasses (STGs) includes the presence of salt glands on the leaf surface and the Na+ exclusion mechanism since the interaction and replacement of Na+ and K+ greatly determines the survivability of STGs in saline environments. During the last decades or so, various salt-tolerant grasses/halophytes have been explored for the mining of salt-tolerant genes and testing their efficacy to improve the limit of salt tolerance in crop plants. Still, the utility of halophytes is limited due to the non-availability of any model halophytic plant system as well as the lack of complete genomic information. To date, although Arabidopsis (Arabidopsis thaliana) and salt cress (Thellungiella halophila) are being used as model plants in most salt tolerance studies, these plants are short-lived and can tolerate salinity for a shorter duration only. Thus, identifying the unique genes for salt tolerance pathways in halophytes and their introgression in a related cereal genome for better tolerance to salinity is the need of the hour. Modern technologies including RNA sequencing and genome-wide mapping along with advanced bioinformatics programs have advanced the decoding of the whole genetic information of plants and the development of probable algorithms to correlate stress tolerance limit and yield potential. Hence, this article has been compiled to explore the naturally occurring halophytes as potential model plant species for abiotic stress tolerance and to further breed crop plants to enhance salt tolerance through genomic and molecular tools.

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Overexpression of a tonoplast Na+/H+ antiporter from the halophytic shrub Nitraria sibirica improved salt tolerance and root development in transgenic poplar

Cited by 12 publications

References 39 publications

Adaptive Mechanisms of Halophytes and Their Potential in Improving Salinity Tolerance in Plants

Adaptive Mechanisms of Halophytes and Their Potential in Improving Salinity Tolerance in Plants

Overexpression of HaASR1 from a Desert Shrub, Haloxylon ammodendron, Improved Salt Tolerance of Arabidopsis thaliana

Halophytes as new model plant species for salt tolerance strategies

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