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Liang Liu Ying Wang Nan Wang Yuan‐Yuan Dong Xiu‐Duo Fan Xiu‐Ming Liu Jing Yang Hai‐Yan Li 《植物学报(英文版)》2011,53(9):731-742
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Co‐expression of tonoplast Cation/H+ antiporter and H+‐pyrophosphatase from xerophyte Zygophyllum xanthoxylum improves alfalfa plant growth under salinity,drought and field conditions
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Salinity and drought are major environmental factors limiting the growth and productivity of alfalfa worldwide as this economically important legume forage is sensitive to these kinds of abiotic stress. In this study, transgenic alfalfa lines expressing both tonoplast NXH and H+‐PPase genes, ZxNHX and ZxVP1‐1 from the xerophyte Zygophyllum xanthoxylum L., were produced via Agrobacterium tumefaciens‐mediated transformation. Compared with wild‐type (WT) plants, transgenic alfalfa plants co‐expressing ZxNHX and ZxVP1‐1 grew better with greater plant height and dry mass under normal or stress conditions (NaCl or water‐deficit) in the greenhouse. The growth performance of transgenic alfalfa plants was associated with more Na+, K+ and Ca2+ accumulation in leaves and roots, as a result of co‐expression of ZxNHX and ZxVP1‐1. Cation accumulation contributed to maintaining intracellular ions homoeostasis and osmoregulation of plants and thus conferred higher leaf relative water content and greater photosynthesis capacity in transgenic plants compared to WT when subjected to NaCl or water‐deficit stress. Furthermore, the transgenic alfalfa co‐expressing ZxNHX and ZxVP1‐1 also grew faster than WT plants under field conditions, and most importantly, exhibited enhanced photosynthesis capacity by maintaining higher net photosynthetic rate, stomatal conductance, and water‐use efficiency than WT plants. Our results indicate that co‐expression of tonoplast NHX and H+‐PPase genes from a xerophyte significantly improved the growth of alfalfa, and enhanced its tolerance to high salinity and drought. This study laid a solid basis for reclaiming and restoring saline and arid marginal lands as well as improving forage yield in northern China. 相似文献
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Su-Lian Lv Li-Jun Lian Pei-Lin Tao Zhao-Xia Li Ke-Wei Zhang Ju-Ren Zhang 《Planta》2009,229(4):899-910
An H+-PPase gene, TsVP from Thellungiella halophila, was transferred into two cotton (Gossypium hirsutum) varieties (Lumianyan19 and Lumianyan 21) and southern and northern blotting analysis showed the foreign gene was integrated
into the cotton genome and expressed. The measurement of isolated vacuolar membrane vesicles demonstrated that the transgenic
plants had higher V–H+-PPase activity compared with wild-type plants (WT). Overexpressing TsVP in cotton improved shoot and root growth, and transgenic plants were much more resistant to osmotic/drought stress than the
WT. Under drought stress conditions, transgenic plants had higher chlorophyll content, improved photosynthesis, higher relative
water content of leaves and less cell membrane damage than WT. We ascribe these properties to improved root development and
the lower solute potential resulting from higher solute content such as soluble sugars and free amino acids in the transgenic
plants. In this study, the average seed cotton yields of transgenic plants from Lumianyan 19 and Lumianyan 21 were significantly
increased compared with those of WT after exposing to drought stress for 21 days at flowering stage. The average seed cotton
yields were 51 and 40% higher than in their WT counterparts, respectively. This study benefits efforts to improve cotton yields
in arid and semiarid regions. 相似文献
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Simultaneous expression of regulatory genes associated with specific drought‐adaptive traits improves drought adaptation in peanut
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Vemanna S. Ramu Thavarekere N. Swetha Shekarappa H. Sheela Chandrashekar K. Babitha Sreevathsa Rohini Malireddy K. Reddy Narendra Tuteja Chandrashekar P. Reddy Trichi Ganesh Prasad Makarla Udayakumar 《Plant biotechnology journal》2016,14(3):1008-1020
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Bharathi Y Vijaya Kumar S Pasalu IC Balachandran SM Reddy VD Rao KV 《Journal of biotechnology》2011,152(3):63-71
We have developed transgene pyramided rice lines, endowed with enhanced resistance to major sap-sucking insects, through sexual crosses made between two stable transgenic rice lines containing Allium sativum (asal) and Galanthus nivalis (gna) lectin genes. Presence and expression of asal and gna genes in pyramided lines were confirmed by PCR and western blot analyses. Segregation analysis of F2 progenies disclosed digenic (9:3:3:1) inheritance of the transgenes. Homozygous F3 plants carrying asal and gna genes were identified employing genetic and molecular methods besides insect bioassays. Pyramided lines, infested with brown planthopper (BPH), green leafhopper (GLH) and whitebacked planthopper (WBPH), proved more effective in reducing insect survival, fecundity, feeding ability besides delayed development of insects as compared to the parental transgenics. Under infested conditions, pyramided lines were found superior to the parental transgenics in their seed yield potential. This study represents first report on pyramiding of two lectin genes into rice exhibiting enhanced resistance against major sucking pests. The pyramided lines appear promising and might serve as a novel genetic resource in rice breeding aimed at durable and broad based resistance against hoppers. 相似文献
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Overexpression of AtABCG36 improves drought and salt stress resistance in Arabidopsis 总被引:1,自引:0,他引:1
Do‐Young Kim Jun‐Young Jin Santiago Alejandro Enrico Martinoia Youngsook Lee 《Physiologia plantarum》2010,139(2):170-180
Drought and salt are major abiotic stresses that adversely affect crop productivity. Thus, identification of factors that confer resistance to these stresses would pave way to increasing agricultural productivity. When grown on soil in green house longer than 5 weeks, transgenic Arabidopsis plants that overexpress an ATP‐binding cassette (ABC) transporter, AtABCG36/AtPDR8, produced higher shoot biomass and less chlorotic leaves than the wild‐type. We investigated whether the improved growth of AtABCG36‐overexpressing plants was due to their improved resistance to abiotic stresses, and found that AtABCG36‐overexpressing plants were more resistant to drought and salt stress and grew to higher shoot fresh weight (FW) than the wild‐type. On the contrary, T‐DNA insertional knockout lines were more sensitive to drought stress than wild‐type and were reduced in shoot FW. To understand the mechanism of enhanced salt and drought resistance of the AtABCG36 overexpressing plants, we measured sodium contents and found that AtABCG36 overexpressing plants were lower in sodium content than the wild‐type. Our data suggest that AtABCG36 contributes to drought and salt resistance in Arabidopsis by a mechanism that includes reduction of sodium content in plants. 相似文献
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Manaswini Das Harsh Chauhan Anju Chhibbar Qazi Mohd. Rizwanul Haq Paramjit Khurana 《Transgenic research》2011,20(2):231-246
Osmotin and osmotin-like proteins are stress proteins belonging to the plant PR-5 group of proteins induced in several plant
species in response to various types of biotic and abiotic stresses. We report here the overexpression of tobacco osmotin
in transgenic mulberry plants under the control of a constitutive promoter (CaMV 35S) as well as a stress-inducible rd29A promoter. Southern analysis of the transgenic plants revealed the stable integration of the introduced genes in the transformants.
Real-time PCR analysis provided evidence for the expression of osmotin in the transgenic plants under both the constitutive
and stress-inducible promoters. Transgenic plants with the stress-inducible promoter were observed to better tolerate salt
and drought stress than those with the constitutive promoter. Transgenic plants when subjected to simulated salinity and drought
stress conditions showed better cellular membrane stability (CMS) and photosynthetic yield than non-transgenic plants under
conditions of both salinity and drought stress. Proline levels were very high in transgenic plants with the constitutive promoter
relative to those with the stress-inducible promoter. Fungal challenge undertaken with three fungal species known to cause
serious losses to mulberry cultivation, namely, Fusarium pallidoroseum, Colletotrichum gloeosporioides and Colletotrichum dematium, revealed that transgenic plants with osmotin under control of the constitutive promoter had a better resistance than those with osmotin under the control of the stress-inducible promoter. Evaluation in next generation was undertaken by studying bud break in
transgenic and non-transgenic plants under simulated drought (2% polyethylene glycol) and salt stress (200 mM NaCl) conditions.
The axillary buds of the selected transgenic lines had a better bud break percentage under stressed conditions than buds from
non-transgenic mulberry lines. A biotic assay with Bombyx mori indicated that osmotin protein had no undesirable effect on silkworm rearing and feeding. We therefore conclude that 35S
transgenic plants are better suited for both abiotic stress also biotic challenges (fungal), while the rd29A transgenic plants
are more responsive to drought. 相似文献
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Rhiannon K. Schilling Petra Marschner Yuri Shavrukov Bettina Berger Mark Tester Stuart J. Roy Darren C. Plett 《Plant biotechnology journal》2014,12(3):378-386
Cereal varieties with improved salinity tolerance are needed to achieve profitable grain yields in saline soils. The expression of AVP1, an Arabidopsis gene encoding a vacuolar proton pumping pyrophosphatase (H+‐PPase), has been shown to improve the salinity tolerance of transgenic plants in greenhouse conditions. However, the potential for this gene to improve the grain yield of cereal crops in a saline field has yet to be evaluated. Recent advances in high‐throughput nondestructive phenotyping technologies also offer an opportunity to quantitatively evaluate the growth of transgenic plants under abiotic stress through time. In this study, the growth of transgenic barley expressing AVP1 was evaluated under saline conditions in a pot experiment using nondestructive plant imaging and in a saline field trial. Greenhouse‐grown transgenic barley expressing AVP1 produced a larger shoot biomass compared to null segregants, as determined by an increase in projected shoot area, when grown in soil with 150 mm NaCl. This increase in shoot biomass of transgenic AVP1 barley occurred from an early growth stage and also in nonsaline conditions. In a saline field, the transgenic barley expressing AVP1 also showed an increase in shoot biomass and, importantly, produced a greater grain yield per plant compared to wild‐type plants. Interestingly, the expression of AVP1 did not alter barley leaf sodium concentrations in either greenhouse‐ or field‐grown plants. This study validates our greenhouse‐based experiments and indicates that transgenic barley expressing AVP1 is a promising option for increasing cereal crop productivity in saline fields. 相似文献
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XIUXIA LIU SHUMEI ZHAI YAJIE ZHAO BAOCHENG SUN CHENG LIU AIFANG YANG JUREN ZHANG 《Plant, cell & environment》2013,36(5):1037-1055
Phosphatidylinositol (PtdIns) synthase is a key enzyme in the phospholipid pathway and catalyses the formation of PtdIns. PtdIns is not only a structural component of cell membranes, but also the precursor of the phospholipid signal molecules that regulate plant response to environment stresses. Here, we obtained transgenic maize constitutively overexpressing or underexpressing PIS from maize (ZmPIS) under the control of a maize ubiquitin promoter. Transgenic plants were confirmed by PCR, Southern blotting analysis and real‐time RT‐PCR assay. The electrospray ionization tandem mass spectrometry (ESI‐MS/MS)‐based lipid profiling analysis showed that, under drought stress conditions, the overexpression of ZmPIS in maize resulted in significantly elevated levels of most phospholipids and galactolipids in leaves compared with those in wild type (WT). At the same time, the expression of some genes involved in the phospholipid metabolism pathway and the abscisic acid (ABA) biosynthesis pathway including ZmPLC, ZmPLD, ZmDGK1, ZmDGK3, ZmPIP5K9, ZmABA1, ZmNCED, ZmAAO1, ZmAAO2 and ZmSCA1 was markedly up‐regulated in the overexpression lines after drought stress. Consistent with these results, the drought stress tolerance of the ZmPIS sense transgenic plants was enhanced significantly at the pre‐flowering stages compared with WT maize plants. These results imply that ZmPIS regulates the plant response to drought stress through altering membrane lipid composition and increasing ABA synthesis in maize. 相似文献
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Enhanced expression of phospholipase C 1 (ZmPLC1) improves drought tolerance in transgenic maize 总被引:2,自引:0,他引:2
Phosphatidylinositol-specific phospholipase C (PI-PLC) plays an important role in a variety of physiological processes in
plants, including drought tolerance. It has been reported that the ZmPLC1 gene cloned from maize (Zea mays L.) encoded a PI-PLC and up-regulated the expression in maize roots under dehydration conditions (Zhai SM, Sui ZH, Yang AF,
Zhang JR in Biotechnol Lett 27:799–804, 2005). In this paper, transgenic maize expressing ZmPLC1 transgenes in sense or antisense orientation were generated by Agrobacterium-mediated transformation and confirmed by Southern blot analysis. High-level expression of the transgene was confirmed by
real-time RT-PCR and PI-PLC activity assay. The tolerance to drought stress (DS) of the homogenous transgenic maize plants
was investigated at two developmental stages. The results demonstrated that, under DS conditions, the sense transgenic plants
had higher relative water content, better osmotic adjustment, increased photosynthesis rates, lower percentage of ion leakage
and less lipid membrane peroxidation, higher grain yield than the WT; whereas those expressing the antisense transgene exhibited
inferior characters compared with the WT. It was concluded that enhanced expression of sense ZmPLC1 improved the drought tolerance of maize. 相似文献
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Hong Chen Hao Feng Xueyan Zhang Chaojun Zhang Tao Wang Jiangli Dong 《Plant biotechnology journal》2019,17(3):556-568
The HUB2 gene encoding histone H2B monoubiquitination E3 ligase is involved in seed dormancy, flowering timing, defence response and salt stress regulation in Arabidopsis thaliana. In this study, we used the cauliflower mosaic virus (CaMV) 35S promoter to drive AtHUB2 overexpression in cotton and found that it can significantly improve the agricultural traits of transgenic cotton plants under drought stress conditions, including increasing the fruit branch number, boll number, and boll‐setting rate and decreasing the boll abscission rate. In addition, survival and soluble sugar, proline and leaf relative water contents were increased in transgenic cotton plants after drought stress treatment. In contrast, RNAi knockdown of GhHUB2 genes reduced the drought resistance of transgenic cotton plants. AtHUB2 overexpression increased the global H2B monoubiquitination (H2Bub1) level through a direct interaction with GhH2B1 and up‐regulated the expression of drought‐related genes in transgenic cotton plants. Furthermore, we found a significant increase in H3K4me3 at the DREB locus in transgenic cotton, although no change in H3K4me3 was identified at the global level. These results demonstrated that AtHUB2 overexpression changed H2Bub1 and H3K4me3 levels at the GhDREB chromatin locus, leading the GhDREB gene to respond quickly to drought stress to improve transgenic cotton drought resistance, but had no influence on transgenic cotton development under normal growth conditions. Our findings also provide a useful route for breeding drought‐resistant transgenic plants. 相似文献
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Michael Gomez Selvaraj Asad Jan Takuma Ishizaki Milton Valencia Beata Dedicova Kyonoshin Maruyama Takuya Ogata Daisuke Todaka Kazuko Yamaguchi‐Shinozaki Kazuo Nakashima Manabu Ishitani 《Plant biotechnology journal》2020,18(8):1711-1721
Increasing drought resistance without sacrificing grain yield remains an ongoing challenge in crop improvement. In this study, we report that O ryza s ativa CCCH‐t andem z inc f inger protein 5 (OsTZF5) can confer drought resistance and increase grain yield in transgenic rice plants. Expression of OsTZF5 was induced by abscisic acid, dehydration and cold stress. Upon stress, OsTZF5‐GFP localized to the cytoplasm and cytoplasmic foci. Transgenic rice plants overexpressing OsTZF5 under the constitutive maize ubiquitin promoter exhibited improved survival under drought but also growth retardation. By introducing OsTZF5 behind the stress‐responsive OsNAC6 promoter in two commercial upland cultivars, Curinga and NERICA4, we obtained transgenic plants that showed no growth retardation. Moreover, these plants exhibited significantly increased grain yield compared to non‐transgenic cultivars in different confined field drought environments. Physiological analysis indicated that OsTZF5 promoted both drought tolerance and drought avoidance. Collectively, our results provide strong evidence that OsTZF5 is a useful biotechnological tool to minimize yield losses in rice grown under drought conditions. 相似文献