The Rice High-Affinity Potassium Transporter1;1 Is Involved in Salt Tolerance and Regulated by an MYB-Type Transcription Factor

Wang, Rong; Jing, Wen; Xiao, Longyun; Jin, Yakang; Shen, Like; Zhang, Wenhua

doi:10.1104/pp.15.00298

Cited by 205 publications

(181 citation statements)

References 66 publications

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“…6, H-K). This tissue specificity of expression of OsMGT1 is similar to OsHKT1;1 and OsHKT1;4 (Wang et al, 2015;Suzuki et al, 2016). Therefore, there is a possibility that Mg 2+ transported by OsMGT1 in these tissues also plays a role in enhancing the transport activity of OsHKT1;1 and OsHKT1;5, although further work remains to be done.…”

Section: Discussion Different Roles Of Osmgt1 In Al Tolerance and Salmentioning

confidence: 63%

“…Several salt tolerance genes in rice have been reported including OsSOS1, OsHKT1;1, OsHKT1;4, and OsHKT1;5, which function as Na + transporters (Martínez-Atienza et al, 2007;Wang et al, 2015;Suzuki et al, 2016;Ren et al, 2005 expression of OsSOS1 in the roots was not induced by NaCl within 24 h, and there was also no difference in the expression level of OsSOS1 between wild type and two osmgt1 mutants ( Fig. 5G; Supplemental Fig.…”

Section: Discussion Different Roles Of Osmgt1 In Al Tolerance and Salmentioning

confidence: 96%

“…2A), it is unlikely that OsSOS1 activity is associated with OsMGT1. On the other hand, OsHKT1;1 was mainly expressed in the shoots (Wang et al, 2015), and the contribution of OsHKT1;4 to the Na exclusion from shoots was found to be low at the vegetative growth stage (Suzuki et al, 2016). Therefore, the possibility of these transporters in restricting Na accumulation through OsMGT1 is also excluded at the young seedling stage.…”

Section: Discussion Different Roles Of Osmgt1 In Al Tolerance and Salmentioning

confidence: 97%

“…All these members function as a Na + influx transporter but have different expression patterns. OsHKT1;1 encodes a plasma membrane-localized protein and was mainly expressed in the phloem of leaf blades (Wang et al, 2015). Knockout of this gene resulted in increased salt sensitivity and Na accumulation in the shoots, indicating that OsHKT1;1 is involved in retrieving Na + from the leaf blade (Wang et al, 2015).…”

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confidence: 99%

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A Magnesium Transporter OsMGT1 Plays a Critical Role in Salt Tolerance in Rice

et al. 2017

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Salt stress is one of the major factors limiting rice (Oryza sativa) production globally. Although several transporters involved in salt tolerance have been identified in rice, the mechanisms regulating their transport activity are still poorly understood. Here, we show evidence that a rice Mg transporter OsMGT1 is required for salt tolerance probably by regulating transport activity of OsHKT1;5, a key transporter for the removal of Na + from the xylem sap at the root mature zone. Knockout of OsMGT1 did not affect total Na uptake, but increased Na concentration in the shoots and xylem sap, resulting in a significant increase in salt sensitivity at low external Mg 2+ concentration (20-200 mM). However, such differences were abolished at a higher Mg 2+ concentration (2 mM), although the total Na uptake was not altered. OsMGT1 was expressed in both the roots and shoots, but only that in the roots was moderately up-regulated by salt stress. Spatial expression analysis revealed that OsMGT1 was expressed in all root cells of the root tips but was highly expressed in the pericycle of root mature zone. OsMGT1 was also expressed in the phloem region of basal node, leaf blade, and sheath. When expressed in Xenopus laevis oocytes, the transport activity of OsHKT1;5 was enhanced by elevating external Mg 2+ concentration. Furthermore, knockout of OsHKT1;5 in osmgt1 mutant background did not further increase its salt sensitivity. Taken together, our results suggest that Mg 2+ transported by OsMGT1 in the root mature zone is required for enhancing OsHKT1;5 activity, thereby restricting Na accumulation to the shoots.

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Section: Discussion Different Roles Of Osmgt1 In Al Tolerance and Salmentioning

confidence: 63%

Section: Discussion Different Roles Of Osmgt1 In Al Tolerance and Salmentioning

confidence: 96%

Section: Discussion Different Roles Of Osmgt1 In Al Tolerance and Salmentioning

confidence: 97%

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confidence: 99%

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A Magnesium Transporter OsMGT1 Plays a Critical Role in Salt Tolerance in Rice

et al. 2017

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“…OsMYB1R1 is the first rice MYB family gene identified to function in flowering time MYB TFs in rice mainly function in biotic and abiotic stress [43][44][45][46][47][48], secondary wall biosynthesis [49,50], . Tissue-specific expression patterns of OsMYB1R1 (means AE SD, n = 3).…”

Section: Discussionmentioning

confidence: 99%

Overexpression of OsMYB1R1–VP64 fusion protein increases grain yield in rice by delaying flowering time

Wang

Zhu

et al. 2016

FEBS Letters

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Edited by Ulf-Ingo Fl€ ugge VP64 is widely used as a transcriptional activator to investigate the biological function of genes, but its potential for application in genetic improvement of crops has not been fully investigated. Here, we characterized an OsMYB1R1-VP64 fusion protein that enhanced the grain yield of rice cultivar 'Kita-ake' by 35%. OsMYB1R1-VP64 regulated grain yield of transgenic plants mainly by extending the vegetative growth stage. Further analysis indicated that OsMYB1R1-VP64 delayed flowering by down-regulating expression of Heading date 3a (Hd3a) and RICE FLOWERING LOCUST 1 (RFT1) through repression of Early heading date 1 (Ehd1). The expression pattern of OsMYB1R1 was constitutive and rhythmically controlled. OsMYB1R1 protein had transcriptional activation activity and was localized to the nucleus. Our findings suggest that the OsMYB1R1-VP64 construct can be used to increase grain yield in rice.Keywords: flowering time; grain yield; VP64 Rice (Oryza sativa L.) is one of the most important food crops in the world, and is the staple food for more than 75% of the population in Asia [1]. With increasing population and decreasing arable land area more productive varieties are needed to address food shortages. The yield of a rice variety is determined by three important factors, namely effective panicle number per plant, grain number per panicle, and 1000-grain weight. These in turn are affected by genotype, environmental conditions (physical environment and agronomy), and their interactions. The key genetic factors are tiller number, flowering time, fertility, and seed setting rate. As the transition point, flowering time plays a key role in coordination between vegetative and reproductive growth [2]. Vegetative growth sets the basis of reproductive growth, which involves the formation, quality, and nutritive accumulation of reproductive organs. Flowering time also affects crop yield by enabling crops to gain the maximum benefit from the prevailing conditions [3,4]. Therefore, control and optimization of flowering time has been under intense scrutiny by breeders and agronomists for a long time [5].

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Adaptive Mechanisms of Soybean Grown on Salt‐Affected Soils

Cao

Liu

et al. 2017

Land Degrad Dev

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Soybean (Glycine max) is an economically important pulse crop for livestock feed, human consumption and industrial use as a source for production of biodiesel. However, soybean yield is detrimentally affected by soil salinity around the world. To cope with soil salinization, in addition to soil remediation, approaches used in genetically modifying soybean genotypes to increase their productivity under saline conditions are also of importance. Thus, it is crucial to unravel the mechanisms controlling soybean responses to soil salinity in order to improve soybean performance with high salinity tolerance. Knowledge of the regulatory network for salt tolerance in model plants, including Arabidopsis, and the publically available soybean genome sequence has accelerated identification and functional analyses of genes regulating soybean responses to high salinity. This review presents an update of recent works on genetic studies of salt tolerance and the mechanisms regulating soybean responses and tolerance to soil salinity. We also discuss the effort and progress that have been made in the last decade toward developing high salt‐tolerant soybean varieties with improved productivity. Copyright © 2017 John Wiley & Sons, Ltd.

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The Rice High-Affinity Potassium Transporter1;1 Is Involved in Salt Tolerance and Regulated by an MYB-Type Transcription Factor

Cited by 205 publications

References 66 publications

A Magnesium Transporter OsMGT1 Plays a Critical Role in Salt Tolerance in Rice

A Magnesium Transporter OsMGT1 Plays a Critical Role in Salt Tolerance in Rice

Overexpression of OsMYB1R1–VP64 fusion protein increases grain yield in rice by delaying flowering time

Adaptive Mechanisms of Soybean Grown on Salt‐Affected Soils

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