共查询到20条相似文献,搜索用时 15 毫秒
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Zhongyi Wang Liming Wang Lijie Han Zhihua Cheng Xiaofeng Liu Shaoyun Wang Liu Liu Jiacai Chen Weiyuan Song Jianyu Zhao Zhaoyang Zhou Xiaolan Zhang 《Plant physiology》2021,187(3):1619
Warty fruit in cucumber (Cucumis sativus L.) is an important quality trait that greatly affects fruit appearance and market value. The cucumber wart consists of fruit trichomes (spines) and underlying tubercules, in which the existence of spines is prerequisite for tubercule formation. Although several regulators have been reported to mediate spine or tubercule formation, the direct link between spine and tubercule development remains unknown. Here, we found that the basic Helix-Loop-Helix (bHLH) gene HECATE2 (CsHEC2) was highly expressed in cucumber fruit peels including spines and tubercules. Knockout of CsHEC2 by the CRISPR/Cas9 system resulted in reduced wart density and decreased cytokinin (CTK) accumulation in the fruit peel, whereas overexpression of CsHEC2 led to elevated wart density and CTK level. CsHEC2 is directly bound to the promoter of the CTK hydroxylase-like1 gene (CsCHL1) that catalyzes CTK biosynthesis, and activated CsCHL1 expression. Moreover, CsHEC2 physically interacted with GLABROUS3 (CsGL3, a key spine regulator) and Tuberculate fruit (CsTu, a core tubercule formation factor), and such interactions further enhanced CsHEC2-mediated CsCHL1 expression. These data suggested that CsHEC2 promotes wart formation by acting as an important cofactor for CsGL3 and CsTu to directly stimulate CTK biosynthesis in cucumber. Thus, CsHEC2 can serve as a valuable target for molecular breeding of cucumber varieties with different wart density requirements.Fruit wart is a key external quality trait, and CsHECATE2 promotes wart formation by interacting with a spine regulator and a tubercule factor to directly stimulate cytokinin biosynthesis in cucumber 相似文献
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Xuewen Xu Chenxi Wei Qianya Liu Wenqing Qu Xiaohua Qi Qiang Xu Xuehao Chen 《Plant biotechnology journal》2020,18(7):1598-1609
Fruit neck length (FNL) is an important quality trait in cucumber because it directly affects its market value. However, its genetic basis remains largely unknown. We identified a candidate gene for FNL in cucumber using a next‐generation sequencing‐based bulked segregant analysis in F2 populations, derived from a cross between Jin5‐508 (long necked) and YN (short necked). A quantitative trait locus (QTL) on chromosome 7, Fnl7.1, was identified through a genome‐wide comparison of single nucleotide polymorphisms between long and short FNL F2 pools, and it was confirmed by traditional QTL mapping in multiple environments. Fine genetic mapping, sequences alignment and gene expression analysis revealed that CsFnl7.1 was the most likely candidate Fnl7.1 locus, which encodes a late embryogenesis abundant protein. The increased expression of CsFnl7.1 in long‐necked Jin5‐508 may be attributed to mutations in the promoter region upstream of the gene body. The function of CsFnl7.1 in FNL control was confirmed by its overexpression in transgenic cucumbers. CsFnl7.1 regulates fruit neck development by modulating cell expansion. Probably, this is achieved through the direct protein–protein interactions between CsFnl7.1 and a dynamin‐related protein CsDRP6 and a germin‐like protein CsGLP1. Geographical distribution differences of the FNL phenotype were found among the different cucumber types. The East Asian and Eurasian cucumber accessions were highly enriched with the long‐necked and short‐necked phenotypes, respectively. A further phylogenetic analysis revealed that the Fnl7.1 locus might have originated from India. Thus, these data support that the CsFnl7.1 has an important role in increasing cucumber FNL. 相似文献
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Dong‐Hui Wang Feng Li Qiao‐Hong Duan Tao Han Zhi‐Hong Xu Shu‐Nong Bai 《The Plant journal : for cell and molecular biology》2010,61(5):862-872
It is well established that ethylene promotes female flower development in cucumber. However, little is known about how the gaseous hormone selectively affects female flowers, and what mechanism it uses. Previously, we found organ‐specific DNA damage in the primordial anther of female cucumber flowers. This finding led to a hypothesis that ethylene might promote female flower development via the organ‐specific induction of DNA damage in primordial anthers. In this study, we tested this hypothesis first by demonstrating ethylene induction of DNA damage via the ethylene signaling pathway using cucumber protoplasts. Then, using representative component genes of the ethylene signaling pathway as probes, we found that one of the ethylene receptors, CsETR1, was temporally and spatially downregulated in the stamens of stage‐6 female cucumber flowers, especially along with the increase of the nodes. Furthermore, by constructing transgenic Arabidopsis plants with organ‐specific expression of antisense CsETR1 under the control of an AP3 promoter to downregulate ETR1 expression in the stamens, we generated Arabidopsis ‘female flowers’, in which the abnormal stamens mimic those of female cucumber flowers. Our data suggest that ethylene perception is involved in the arrest of stamen development in female cucumber flowers through the induction of DNA damage. This opens up a novel perspective and approach to solve the half‐century‐long puzzle of how gaseous ethylene selectively promotes female flowers in the monoecious cucumber plant. 相似文献
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BEL1‐LIKE HOMEODOMAIN 11 regulates chloroplast development and chlorophyll synthesis in tomato fruit 下载免费PDF全文
Lanhuan Meng Zhongqi Fan Qiang Zhang Cuicui Wang Ying Gao Yikang Deng Benzhong Zhu Hongliang Zhu Jianye Chen Wei Shan Xueren Yin Silin Zhong Donald Grierson Cai‐Zhong Jiang Yunbo Luo Da‐Qi Fu 《The Plant journal : for cell and molecular biology》2018,94(6):1126-1140
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M. Szwacka E. Siedlecka R. Zawirska-Wojtasiak Ł. Wiśniewski S. Malepszy 《Journal of applied genetics》2009,50(1):9-16
Thaumatin II is an extremely sweet-tasting protein produced by fruits of the West African shrubThaumatococcus daniellii Benth, so it can be used in biotechnology to improve the tastes of various plant products. This study is concerned with the
spatial and temporal aspects of expression of the 35S-pre-prothaumatin II chimeric gene in flower buds and fruits of transgenic
cucumber (Cucumis sativus L.) line 225. The activity of the 35S promoter in organs of line 225 was compared with its activity in 2 other transgenic
lines. The accumulation of recombinant thaumatin varied spatially in flower bud tissues of transgenic lines. We found that
these differences in the spatial accumulation of transgenic protein concerned the ovary of female buds and the perianth of
male buds. In contrast to flower parts, recombinant thaumatin was found in nearly all parts of the young fruit from the transgenic
plants. The pre-prothaumatin II gene expression was detected at a very early developmental stage in male buds, and its pattern
was rather conserved as the buds aged. The expression of the transgene was also detected in vascular tissues of examined organs
but was undetectable in pollen grains, in agreement with the generally held view that the CaMV 35S promoter is virtually silent
in pollen. Immunocytochemical analyses of sections of control organs revealed endogenous homolog(s) of thaumatin when using
polyclonal antisera, but not when using monoclonal antibodies for recombinant thaumatin detection in transgenic cucumber. 相似文献
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The barley anion channel,HvALMT1, has multiple roles in guard cell physiology and grain metabolism 下载免费PDF全文
Muyun Xu Benjamin D. Gruber Emmanuel Delhaize Rosemary G. White Richard A. James Jiangfeng You Zhenming Yang Peter R. Ryan 《Physiologia plantarum》2015,153(1):183-193
The barley (Hordeum vulgare) gene HvALMT1 encodes an anion channel in guard cells and in certain root tissues indicating that it may perform multiple roles. The protein localizes to the plasma membrane and facilitates malate efflux from cells when constitutively expressed in barley plants and Xenopus oocytes. This study investigated the function of HvALMT1 further by identifying its tissue‐specific expression and by generating and characterizing RNAi lines with reduced HvALMT1 expression. We show that transgenic plants with 18–30% of wild‐type HvALMT1 expression had impaired guard cell function. They maintained higher stomatal conductance in low light intensity and lost water more rapidly from excised leaves than the null segregant control plants. Tissue‐specific expression of HvALMT1 was investigated in developing grain and during germination using transgenic barley lines expressing the green fluorescent protein (GFP) with the HvALMT1 promoter. We found that HvALMT1 is expressed in the nucellar projection, the aleurone layer and the scutellum of developing barley grain. Malate release measured from isolated aleurone layers prepared from imbibed grain was significantly lower in the RNAi barley plants compared with control plants. These data provide molecular and physiological evidence that HvALMT1 functions in guard cells, in grain development and during germination. We propose that HvALMT1 releases malate and perhaps other anions from guard cells to promote stomatal closure. The likely roles of HvALMT1 during seed development and grain germination are also discussed. 相似文献
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Overexpression of the IbMYB1 gene in an orange‐fleshed sweet potato cultivar produces a dual‐pigmented transgenic sweet potato with improved antioxidant activity 下载免费PDF全文
Sung‐Chul Park Yun‐Hee Kim Sun Ha Kim Yu Jeong Jeong Cha Young Kim Joon Seol Lee Ji‐Yeong Bae Mi‐Jeong Ahn Jae Cheol Jeong Haeng‐Soon Lee Sang‐Soo Kwak 《Physiologia plantarum》2015,153(4):525-537
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Host‐induced gene silencing of an essential chitin synthase gene confers durable resistance to Fusarium head blight and seedling blight in wheat 下载免费PDF全文
Wei Cheng Xiu‐Shi Song He‐Ping Li Le‐Hui Cao Ke Sun Xiao‐Li Qiu Yu‐Bin Xu Peng Yang Tao Huang Jing‐Bo Zhang Bo Qu Yu‐Cai Liao 《Plant biotechnology journal》2015,13(9):1335-1345
Fusarium head blight (FHB) and Fusarium seedling blight (FSB) of wheat, caused by Fusarium pathogens, are devastating diseases worldwide. We report the expression of RNA interference (RNAi) sequences derived from an essential Fusarium graminearum (Fg) virulence gene, chitin synthase (Chs) 3b, as a method to enhance resistance of wheat plants to fungal pathogens. Deletion of Chs3b was lethal to Fg; disruption of the other Chs gene family members generated knockout mutants with diverse impacts on Fg. Comparative expression analyses revealed that among the Chs gene family members, Chs3b had the highest expression levels during Fg colonization of wheat. Three hairpin RNAi constructs corresponding to the different regions of Chs3b were found to silence Chs3b in transgenic Fg strains. Co‐expression of these three RNAi constructs in two independent elite wheat cultivar transgenic lines conferred high levels of stable, consistent resistance (combined type I and II resistance) to both FHB and FSB throughout the T3 to T5 generations. Confocal microscopy revealed profoundly restricted mycelia in Fg‐infected transgenic wheat plants. Presence of the three specific short interfering RNAs in transgenic wheat plants was confirmed by Northern blotting, and these RNAs efficiently down‐regulated Chs3b in the colonizing Fusarium pathogens on wheat seedlings and spikes. Our results demonstrate that host‐induced gene silencing of an essential fungal chitin synthase gene is an effective strategy for enhancing resistance in crop plants under field test conditions. 相似文献
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GBF1 differentially regulates CAT2 and PAD4 transcription to promote pathogen defense in Arabidopsis thaliana 下载免费PDF全文
Mrunmay K. Giri Nidhi Singh Zeeshan Z. Banday Vijayata Singh Hathi Ram Deepjyoti Singh Sudip Chattopadhyay Ashis K. Nandi 《The Plant journal : for cell and molecular biology》2017,91(5):802-815
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Yaxin Li Huan Liu Xuehui Yao Jiang Wang Sheng Feng Lulu Sun Si Ma Kang Xu Li-Qing Chen Xiaolei Sui 《Plant physiology》2021,186(1):640
In the fleshy fruit of cucumbers (Cucumis sativus L.), the phloem flow is unloaded via an apoplasmic pathway, which requires protein carriers to export sugars derived from stachyose and raffinose into the apoplasm. However, transporter(s) involved in this process remain unidentified. Here, we report that a hexose transporter, CsSWEET7a (Sugar Will Eventually be Exported Transporter 7a), was highly expressed in cucumber sink tissues and localized to the plasma membrane in companion cells of the phloem. Its expression level increased gradually during fruit development. Down-regulation of CsSWEET7a by RNA interference (RNAi) resulted in smaller fruit size along with reduced soluble sugar levels and reduced allocation of 14C-labelled carbon to sink tissues. CsSWEET7a overexpression lines showed an opposite phenotype. Interestingly, genes encoding alkaline α-galactosidase (AGA) and sucrose synthase (SUS) were also differentially regulated in CsSWEET7a transgenic lines. Immunohistochemical analysis demonstrated that CsAGA2 co-localized with CsSWEET7a in companion cells, indicating cooperation between AGA and CsSWEET7a in fruit phloem unloading. Our findings indicated that CsSWEET7a is involved in sugar phloem unloading in cucumber fruit by removing hexoses from companion cells to the apoplasmic space to stimulate the raffinose family of oligosaccharides (RFOs) metabolism so that additional sugars can be unloaded to promote fruit growth. This study also provides a possible avenue towards improving fruit production in cucumber.Transporter CsSWEET7a removes hexose from companion cells to the apoplasmic space to stimulate fruit phloem unloading so that additional sugars can be unloaded to promote fruit growth. 相似文献
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Yin Z Malinowski R Ziółkowska A Sommer H Plcader W Malepszy S 《Cellular & molecular biology letters》2006,11(2):279-290
Parthenocarpy (seedless fruits) is a desirable trait that has been achieved in many plant cultivars. We generated parthenocarpic
cucumber fruits by introducing the chimeric DefH9-iaaM construct into the cucumber genome using an Agrobacterium tumefaciens-mediated protocol. The construct consists of the DefH9 promoter from Antirrhinum majus and the iaaM coding sequence from Pseudomonas syringae. Transgenic plants were obtained from nine independent transformation events: half of these were tetraploid and did not produce
seeds following self-pollination, while the remaining half were capable of displaying parthenocarpy in the subsequent reproductive
generation. Of the fruits produced by the transgenic lines, 70–90% were parthenocarpic. The segregation of the marker gene
in the transgenic T1 progeny indicated single gene inheritance. The seed set in the transgenic lines and their F1 hybrids was lower than in the non-transgenic control plants. Some of the methodological details and the practical significance
of the results are discussed.
This paper is dedicated to Prof. Juergen Grunewaldt from Hannover on the occasion of his retirement. 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