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1. Comparative genomic and phylogenetic analysis of anthocyanin biosynthetic genes in Arabidopsis thaliana and Brassica oleracea | |||
REN Jie,LIU Zhiyong,TAN Chong,ZHANG Yun,FENG Hui | |||
Agronomy 20 May 2016 | |||
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Abstract:Background: Anthocyanins are water-soluble natural pigments that are widely distributed in plants. Numerous studies of these flavonoids, which play many important physiological roles, have been performed in the model plant Arabidopsis thaliana. However, no previous studies have focused on anthocyanin biosynthetic pathways in Brassica oleracea. We therefore performed a comparative genomic and phylogenetic analysis of anthocyanin biosynthetic genes in B. oleracea and A. thaliana to explore this pathway in B. oleracea. Results: B. oleracea contains 113 anthocyanin biosynthesis genes, which are orthologs of 62 AtABGs. More than one copy of these genes are present in B. oleracea compared to A. thaliana. Whole genome duplication and tandem duplication have affected these structural and regulatory genes in B. oleracea. More structural genes encode proteins that function upstream of the anthocyanin biosynthetic pathway than downstream. Conclusions: This systematic study of anthocyanin biosynthetic genes in B. oleracea will help elucidate the genetic mechanism of anthocyanin biosynthesis in B. oleracea and perhaps plants in general. The results may also be useful for breeding high-anthocyanin plants. Results: B. oleracea contains 113 anthocyanin biosynthesis genes, which are orthologs of 62 AtABGs. More than one copy of these genes are present in B. oleracea compared to A. thaliana. Whole genome duplication and tandem duplication have affected these structural and regulatory genes in B. oleracea. More structural genes encode proteins that function upstream of the anthocyanin biosynthetic pathway than downstream. Conclusions: This systematic study of anthocyanin biosynthetic genes in B. oleracea will help elucidate the genetic mechanism of anthocyanin biosynthesis in B. oleracea and perhaps plants in general. The results may also be useful for breeding high-anthocyanin plants. | |||
TO cite this article:REN Jie,LIU Zhiyong,TAN Chong, et al. Comparative genomic and phylogenetic analysis of anthocyanin biosynthetic genes in Arabidopsis thaliana and Brassica oleracea[OL].[20 May 2016] http://en.paper.edu.cn/en_releasepaper/content/4688557 |
2. Comparative transcriptome analysis of a female-sterile mutant (fsm) in Chinese cabbage (Brassica campestris ssp. pekinensis) | |||
HUANG Shengnan,LIU Zhiyong,LI Chengyu,YAO Runpeng,LI Danyang,LI Xiang,HOU Li,FENG Hui | |||
Agronomy 16 May 2016 | |||
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Abstract:In this study, we identified the female-sterile mutant fsm in Chinese cabbage. This mutant, which exhibits stable inheritance, was derived from Chinese cabbage DH line 'FT' using a combination of isolated microspore culture and ethyl methanesulfonate (EMS) mutagenesis. Genetic analysis indicated that the phenotype of fsm is controlled by a single recessive nuclear gene. Morphological observations revealed significant differences between the floral organs of fsm and wild-type line 'FT'. Parts of the pistils of fsm are smaller and shorter than those of 'FT', especially the ovary, which may directly cause the female sterility of the mutant. Comparative transcriptome analysis of 'FT' and fsm using RNA-Seq revealed a total of 1,872 differentially expressed genes (DEGs) between 'FT' and fsm. Of these, a number of genes involved in ovule development were identified, such as PRETTY FEW SEEDS 2 (PFS2) and Temperature-Induced Lipocalin (TIL), which were upregulated in fsm vs. 'FT'. In addition, qRT-PCR analysis of the expression patterns of 18 DEGs confirmed the accuracy of the RNA-seq data. These results shed light on the molecular mechanisms underlying pistil development in Chinese cabbage. | |||
TO cite this article:HUANG Shengnan,LIU Zhiyong,LI Chengyu, et al. Comparative transcriptome analysis of a female-sterile mutant (fsm) in Chinese cabbage (Brassica campestris ssp. pekinensis)[OL].[16 May 2016] http://en.paper.edu.cn/en_releasepaper/content/4688563 |
3. The effects of ABA on photosynthesis in tomato under sub-high temperature and high light stress | |||
Liu Yufeng,GANG Shuang,LI Tianlai | |||
Agronomy 15 March 2016 | |||
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Abstract:The present study investigated the role of abscisic acid (ABA) application in photosynthesis, photosystems I and II (PSI and PSII), antioxidant system and ABA-related genes expression under sub-high temperature and high light (STHL) stress. STHL treatment led to an irreversible reduction in the photosynthetic rate (Pn),damaged PSII firstly at three hours , and then inhibited RuBPCase activity at seven hours, at last injured PSI after eleven hours. During 11 hours STHL stress, exogenous ABA can alleviate the degree of Pn decreasing, improve the activity of RuBPCase, protect PSII to photoinhibition, and promote the ability of reactive oxygen removal .When severe stress occured, exogenous ABA has certain effect, but can not ease photoinhibition and photodamage. In addition, exogenous ABA effected significantly on genes of upstream regulatory ABA biosynthesis key enzymes and downstream response MYB transcription factors. | |||
TO cite this article:Liu Yufeng,GANG Shuang,LI Tianlai. The effects of ABA on photosynthesis in tomato under sub-high temperature and high light stress[OL].[15 March 2016] http://en.paper.edu.cn/en_releasepaper/content/4681031 |
4. Effects of Calcium on Photosynthesis, Antioxidant System, and Chloroplast Ultrastructure in Tomato Leaves Under Low Night Temperature Stress | |||
LIUYufeng,ZHANG Guoxian,LI Tianlai | |||
Agronomy 16 October 2014 | |||
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Abstract:The effect of exogenous CaCl2 on photosynthesis, antioxidant system, and chloroplast ultrastructure of tomato leaves under low night temperature (LNT) was investigated. Tomato seedlings were pretreated with 27 mM CaCl2, 5 mM EGTA respectively for 4 days and then exposed to LNT treatment at 6 C for 7 d. Plants treated with CaCl2 showed higher photosynthesis, increased stomatal aperture and chloroplast area, and decreased number of starch grains under LNT stress than those treated with distilled water. LNT increased the contents of superoxide radicals, hydrogen peroxide, and malondialdehyde, whereas calcium application reduced the contents of these compounds. The increase in antioxidant activities caused by LNT stress was also enhanced by the application of exogenous calcium. The opposite effects were observed with ethyleneglycol-bis-(2-aminoethyl) tetraacetic acid pretreatment. CaCl2 application improved photosynthesis in LNT-stressed plants. Such improvement was associated with increased stomatal conductance, improved antioxidant activities, and adjusted chloroplast structure. These results suggest that CaCl2 application improved photosynthesis in LNT-stressed plants. Such improvement was associated with increased stomatal conductance, improved antioxidant activities, and adjusted chloroplast structure. It provided fundamental information for further molecular mechanism research. | |||
TO cite this article:LIUYufeng,ZHANG Guoxian,LI Tianlai. Effects of Calcium on Photosynthesis, Antioxidant System, and Chloroplast Ultrastructure in Tomato Leaves Under Low Night Temperature Stress[OL].[16 October 2014] http://en.paper.edu.cn/en_releasepaper/content/4613944 |
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