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Transgenic poplar expressing Arabidopsis YUCCA6 exhibits auxin-overproduction phenotypes and increased tolerance to abiotic stress.

Identifieur interne : 001A80 ( Main/Exploration ); précédent : 001A79; suivant : 001A81

Transgenic poplar expressing Arabidopsis YUCCA6 exhibits auxin-overproduction phenotypes and increased tolerance to abiotic stress.

Auteurs : Qingbo Ke [Corée du Sud] ; Zhi Wang [République populaire de Chine] ; Chang Yoon Ji [Corée du Sud] ; Jae Cheol Jeong [Corée du Sud] ; Haeng-Soon Lee [Corée du Sud] ; Hongbing Li [République populaire de Chine] ; Bingcheng Xu [République populaire de Chine] ; Xiping Deng [République populaire de Chine] ; Sang-Soo Kwak [Corée du Sud]

Source :

RBID : pubmed:25980973

Descripteurs français

English descriptors

Abstract

YUCCA6, a member of the YUCCA family of flavin monooxygenase-like proteins, is involved in the tryptophan-dependent IAA biosynthesis pathway and responses to environmental cues in Arabidopsis. However, little is known about the role of the YUCCA pathway in auxin biosynthesis in poplar. Here, we generated transgenic poplar (Populus alba × P. glandulosa) expressing the Arabidopsis YUCCA6 gene under the control of the oxidative stress-inducible SWPA2 promoter (referred to as SY plants). Three SY lines (SY7, SY12 and SY20) were selected based on the levels of AtYUCCA6 transcript. SY plants displayed auxin-overproduction morphological phenotypes, such as rapid shoot growth and retarded main root development with increased root hair formation. In addition, SY plants had higher levels of free IAA and early auxin-response gene transcripts. SY plants exhibited tolerance to drought stress, which was associated with reduced levels of reactive oxygen species. Furthermore, SY plants showed delayed hormone- and dark-induced senescence in detached leaves due to higher photosystem II efficiency and less membrane permeability. These results suggest that the conserved IAA biosynthesis pathway mediated by YUCCA family members exists in poplar.

DOI: 10.1016/j.plaphy.2015.05.003
PubMed: 25980973


Affiliations:


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<div type="abstract" xml:lang="en">YUCCA6, a member of the YUCCA family of flavin monooxygenase-like proteins, is involved in the tryptophan-dependent IAA biosynthesis pathway and responses to environmental cues in Arabidopsis. However, little is known about the role of the YUCCA pathway in auxin biosynthesis in poplar. Here, we generated transgenic poplar (Populus alba × P. glandulosa) expressing the Arabidopsis YUCCA6 gene under the control of the oxidative stress-inducible SWPA2 promoter (referred to as SY plants). Three SY lines (SY7, SY12 and SY20) were selected based on the levels of AtYUCCA6 transcript. SY plants displayed auxin-overproduction morphological phenotypes, such as rapid shoot growth and retarded main root development with increased root hair formation. In addition, SY plants had higher levels of free IAA and early auxin-response gene transcripts. SY plants exhibited tolerance to drought stress, which was associated with reduced levels of reactive oxygen species. Furthermore, SY plants showed delayed hormone- and dark-induced senescence in detached leaves due to higher photosystem II efficiency and less membrane permeability. These results suggest that the conserved IAA biosynthesis pathway mediated by YUCCA family members exists in poplar. </div>
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<AbstractText>YUCCA6, a member of the YUCCA family of flavin monooxygenase-like proteins, is involved in the tryptophan-dependent IAA biosynthesis pathway and responses to environmental cues in Arabidopsis. However, little is known about the role of the YUCCA pathway in auxin biosynthesis in poplar. Here, we generated transgenic poplar (Populus alba × P. glandulosa) expressing the Arabidopsis YUCCA6 gene under the control of the oxidative stress-inducible SWPA2 promoter (referred to as SY plants). Three SY lines (SY7, SY12 and SY20) were selected based on the levels of AtYUCCA6 transcript. SY plants displayed auxin-overproduction morphological phenotypes, such as rapid shoot growth and retarded main root development with increased root hair formation. In addition, SY plants had higher levels of free IAA and early auxin-response gene transcripts. SY plants exhibited tolerance to drought stress, which was associated with reduced levels of reactive oxygen species. Furthermore, SY plants showed delayed hormone- and dark-induced senescence in detached leaves due to higher photosystem II efficiency and less membrane permeability. These results suggest that the conserved IAA biosynthesis pathway mediated by YUCCA family members exists in poplar. </AbstractText>
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<LastName>Deng</LastName>
<ForeName>Xiping</ForeName>
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<Affiliation>State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Science and Ministry of Water Resources, Northwest A&F University, Yangling, Shaanxi 712100, PR China.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y">
<LastName>Kwak</LastName>
<ForeName>Sang-Soo</ForeName>
<Initials>SS</Initials>
<AffiliationInfo>
<Affiliation>Plant Systems Engineering Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon 305-806, South Korea; Department of Green Chemistry and Environmental Biotechnology, Korea University of Science and Technology, Daejeon 305-350, South Korea. Electronic address: sskwak@kribb.re.kr.</Affiliation>
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<PublicationType UI="D013485">Research Support, Non-U.S. Gov't</PublicationType>
</PublicationTypeList>
<ArticleDate DateType="Electronic">
<Year>2015</Year>
<Month>05</Month>
<Day>09</Day>
</ArticleDate>
</Article>
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<Country>France</Country>
<MedlineTA>Plant Physiol Biochem</MedlineTA>
<NlmUniqueID>9882449</NlmUniqueID>
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<Keyword MajorTopicYN="N">AtYUCCA6</Keyword>
<Keyword MajorTopicYN="N">Auxin</Keyword>
<Keyword MajorTopicYN="N">ROS</Keyword>
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<Year>2015</Year>
<Month>04</Month>
<Day>02</Day>
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<Year>2015</Year>
<Month>05</Month>
<Day>04</Day>
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<PubMedPubDate PubStatus="accepted">
<Year>2015</Year>
<Month>05</Month>
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<Minute>0</Minute>
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<Month>4</Month>
<Day>19</Day>
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<PublicationStatus>ppublish</PublicationStatus>
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<ArticleId IdType="pubmed">25980973</ArticleId>
<ArticleId IdType="pii">S0981-9428(15)30019-X</ArticleId>
<ArticleId IdType="doi">10.1016/j.plaphy.2015.05.003</ArticleId>
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<list>
<country>
<li>Corée du Sud</li>
<li>République populaire de Chine</li>
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<name sortKey="Ke, Qingbo" sort="Ke, Qingbo" uniqKey="Ke Q" first="Qingbo" last="Ke">Qingbo Ke</name>
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<name sortKey="Jeong, Jae Cheol" sort="Jeong, Jae Cheol" uniqKey="Jeong J" first="Jae Cheol" last="Jeong">Jae Cheol Jeong</name>
<name sortKey="Ji, Chang Yoon" sort="Ji, Chang Yoon" uniqKey="Ji C" first="Chang Yoon" last="Ji">Chang Yoon Ji</name>
<name sortKey="Kwak, Sang Soo" sort="Kwak, Sang Soo" uniqKey="Kwak S" first="Sang-Soo" last="Kwak">Sang-Soo Kwak</name>
<name sortKey="Lee, Haeng Soon" sort="Lee, Haeng Soon" uniqKey="Lee H" first="Haeng-Soon" last="Lee">Haeng-Soon Lee</name>
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<name sortKey="Li, Hongbing" sort="Li, Hongbing" uniqKey="Li H" first="Hongbing" last="Li">Hongbing Li</name>
<name sortKey="Xu, Bingcheng" sort="Xu, Bingcheng" uniqKey="Xu B" first="Bingcheng" last="Xu">Bingcheng Xu</name>
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