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Identification and Molecular Characterization of the Alkaloid Biosynthesis Gene Family in Dendrobium catenatum
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作者 Liping Yang Xin Wan +1 位作者 Runyang Zhou Yingdan Yuan 《Phyton-International Journal of Experimental Botany》 SCIE 2024年第1期81-96,共16页
As one of the main active components of Dendrobium catenatum, alkaloids have high medicinal value. The physicochemicalproperties, conserved domains and motifs, phylogenetic analysis, and cis-acting elements of the gen... As one of the main active components of Dendrobium catenatum, alkaloids have high medicinal value. The physicochemicalproperties, conserved domains and motifs, phylogenetic analysis, and cis-acting elements of the genefamily members in the alkaloid biosynthesis pathway of D. catenatum were analyzed by bioinformatics, and theexpression of the genes in different years and tissues was analyzed by qRT-PCR. There are 16 gene families,including 25 genes, in the D. catenatum alkaloid biosynthesis pathway. The analysis of conserved domains andmotifs showed that the types, quantities, and orders of domains and motifs were similar among members ofthe same family, but there were significant differences among families. Phylogenetic analysis indicated that thegene family members showed some evolutionary conservation. Cis-acting element analysis revealed that therewere a large number of light-responsive elements and MYB (v-myb avian myeloblastosis viral oncogene homolog)-related elements in these genes. qRT-PCR showed that expressions of gene family members involved in alkaloidsynthesis were different in different years and tissues of D. catenatum. This study provides a theoretical basisfor further exploration of the regulatory mechanisms of these genes in the alkaloid biosynthesis of D. catenatum. 展开更多
关键词 Dendrobium catenatum gene family alkaloid biosynthesis
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Physiological analysis reveals relatively higher salt tolerance in roots of Ilex integra than in those of Ilex purpurea
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作者 Yongfan Yu Min Zhang +3 位作者 Jianyuan Feng Sujing Sun Peng Zhou Jiading Yang 《Journal of Forestry Research》 SCIE CAS CSCD 2022年第4期1187-1196,共10页
Determining the responses of candidate plants to salt stress is a prerequisite for selecting and breeding suitable plants with high salt tolerance to grow in coastal mudfl at areas with high salinity.Here,2-year cutti... Determining the responses of candidate plants to salt stress is a prerequisite for selecting and breeding suitable plants with high salt tolerance to grow in coastal mudfl at areas with high salinity.Here,2-year cutting seedlings of Ilex purpurea Hassk.(local species)and I.integra Thunb.(introduced species)were grown in pots in a glasshouse and irrigated with a Hoagland-NaCl solution at 0,24,and 48 h.Root samples were collected at 0,1,6,24,and 72 h,and concentration of Na^(+)ion;content of proline,soluble carbohydrate,malondialdehyde(MDA),H_(2)O_(2) and ascorbate;and activity of three key antioxidative enzymes were measured.Roots of I.integra accumulated relatively less Na^(+)and had less membrane lipid peroxidation and H_(2)O_(2) during salt stress,thus indicating a relatively higher salt tolerance than roots of I.purpurea.Values for ascorbate content and antioxidant enzymatic activity suggest that the antioxidant ascorbate and antioxidative catalase may play substantial roles for scavenging reactive oxygen species in I.integra roots during salt treatment.Thus,I.integra is apparently more suitable for growing in local highly saline coastal mudfl ats. 展开更多
关键词 Salt tolerance Ilex purpurea Ilex integra Lipid peroxidation Na^(+)accumulation Antioxidant capacity
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Transcriptome analysis reveals dynamic changes in the salt stress response in Salix 被引量:1
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作者 Jie Zhou Jing Huang +2 位作者 Xueyao Tian Jiwei Zheng Xudong He 《Journal of Forestry Research》 SCIE CAS CSCD 2020年第5期1851-1862,共12页
Soil salinization is a serious ecological problem worldwide and information regarding the salt tolerance mechanisms of Salix is scarce.To elucidate the dynamic changes in the molecular mechanisms of Salix under salt s... Soil salinization is a serious ecological problem worldwide and information regarding the salt tolerance mechanisms of Salix is scarce.To elucidate the dynamic changes in the molecular mechanisms of Salix under salt stress,we generated gene expression profiles and examined changes in the expression of those genes.RNA-Seq was used to produce six cDNA libraries constructed from the leaves of Salix ×jiangsuensis CL‘J2345’treated with NaCl for 0,2,6,12,24 and 48 h.In total,249 million clean reads were assembled into 12,739 unigenes,all of which were clustered into 10 profiles based on their temporal expression patterns.KEGG analysis revealed that as an early defense response,the biosynthesis pathways of cutin,suberin and wax,which are involved in cell wall structure,were activated beginning at 2 h.The expression of secondary metabolism genes,including those involved in the phenylpropanoid,flavonoid,stilbenoid,diarylheptanoid and gingerol pathways,peaked at 6 h and 24 h;the upregulated genes were mainly involved in plant hormone pathways and beta-alanine,galactose and betalain metabolism.We identified roles of key phytohormones and found ETH to be the major signaling molecule activating TFs at 12 h;ETH,ABA,IAA and SA were the key molecules at 24 h.Moreover,we found that the upregulated genes were associated with elevated levels of amino acids,sucrose,inositol,stress proteins and ROS-scavenging enzymes,contributing to the maintenance of water balance.This research constitutes the first detailed analysis of salt stress-related mechanisms in Salix and identifies potential targets for genetic manipulation to improve yields. 展开更多
关键词 De novo assembly RNA-Seq profiling SALIX Salt stress Temporal specificity
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Construction of Fast-growing and High-yielding Willow Forest and Its Utilization 被引量:1
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作者 SHI Shizheng WANG Baosong PAN Mingjian GUO Qun 《Chinese Forestry Science and Technology》 2007年第4期38-46,共9页
For the high biomass and adaptability, application of willow on cultivating bioenergy forest and phytoremediation had been gotten more recognition in the world wide. Integrated with our research practice, we introduce... For the high biomass and adaptability, application of willow on cultivating bioenergy forest and phytoremediation had been gotten more recognition in the world wide. Integrated with our research practice, we introduced the germ plasm of high biomass willow in China, and the new varieties with high biomass and their cultivated techniques were summarized in this article. Moreover, we reported the development up to date in breeding and cultivation on well-bred willow with high biomass and analyzed the foreground of establishing industrial willow with high biomass in China. 展开更多
关键词 WILLOW VARIETIES biomass UTILIZATION
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