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- 저자 : Roy Joy K (검색결과 2 건)
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Reshna O. P.,Beena R.,Joy M.,Viji M. M.,Roy S. 한국작물학회 2022 Journal of crop science and biotechnology Vol.25 No.5
The growth and productivity of rice ( Oryza sativa L.) has been hampered by high soil salinity. Microbial endophytes, the most significant soil microorganisms, boost plant output per unit area by changing physiologically, and ecologically, allowing crop development in saline soils or climates with biotic and abiotic stresses. Piriformospora indica , an endophytic fungus, promotes plant development while also increasing plant resilience to environmental stresses such as salinity. Here we analyzed the beneficial effect of P. indica association on rice seedlings of both tolerant variety VTL-6 and susceptible variety Manu Ratna during different levels of salinity stress conditions (0, 100, 150, 200, 300 and 500 mM NaCl), to check the highest tolerating levels of salinity stress by P.indica in selected tolerant and susceptible rice genotypes. The growth parameters of rice seedlings such as shoot and root lengths, fresh and dry weights, seedling vigour index 1 and 2, root volume and root shoot ratio were found to be enhanced in P. indica -inoculated rice seedlings as compared to non-inoculated control seedlings, irrespective of whether they are exposed to salt stress or not. In the presence of the fungus, however, salt-stressed seedlings performed significantly better than non-inoculated control seedlings by maintain low Na + /K + ratio. All the growth parameters were decreased as the increase in salinity levels. The findings of this study revealed that this fungus has an important function in improving rice development under salt stress environments.
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Sharma Hemant,Shayaba,Kumar Rahul,Kumar Jitendra,Bhadana Deepa,Batra Ritu,Singh Rakhi,Kumar Sachin,Roy Joy K,Balyan Harindra S.,Gupta Pushpendra K. 한국유전학회 2023 Genes & Genomics Vol.45 No.11
Background In recent years, the study of molecular basis of uptake, transport and utilization of grain Fe/Zn (GFe/GZn) in wheat has been an active area of research. As a result, it has been shown that a number of transporters are involved in uptake and transport of Fe. In a recent study, knockout of a transporter gene OsVMT (VACUOLAR MUGINEIC ACID TRANSPORTER) in rice was shown to be involved in Fe homoeostasis. Objective In this study, we analysed VMT genes among six monocots and three dicots with major emphasis on wheat VMT genes (TaVMTs), taking OsVMT gene as a reference. Methods and results Using OsVMT gene as a reference, VMT genes were identified and sequence similarities were examined among six monocots and three dicots. Each VMT protein carried one functional domain and 7 to 10 distinct motifs (including 9 novel motifs). The qRT-PCR analysis showed differential expression by all the six TaVMT genes in pairs of contrasting wheat genotypes with high (FAR4 and WB02) and low (K8027 and HD3226) GFe/GZn at two different grain filling stages (14 DAA and 28 DAA). TaVMT1 genes showed up-regulation in high GFe/Zn genotypes relative to low GFe/Zn genotypes, whereas the TaVMT2 genes showed down-regulation or nonsignificant up-regulation in a few cases. Conclusions At 14 DAA, each of the six TaVMT genes exhibited higher expression in wheat genotypes with high GFe and GZn relative to those with low GFe and GZn, suggesting major role of VMT genes in improvement of grain Fe/Zn homoeostasis, thus making TaVMT genes useful for improvement in Fe/Zn in wheat grains.
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