OrangerV1, Main, Exploration, bibRecord, 001D37

Orthologs of the Class A4 Heat Shock Transcription Factor HsfA4a Confer Cadmium Tolerance in Wheat and Rice[C][W]

Identifieur interne : 001D37 ( Main/Exploration ); précédent : 001D36; suivant : 001D38

Orthologs of the Class A4 Heat Shock Transcription Factor HsfA4a Confer Cadmium Tolerance in Wheat and Rice[C][W]

Auteurs : Donghwan Shim [Corée du Sud] ; Jae-Ung Hwang [Corée du Sud] ; Joohyun Lee [Corée du Sud] ; Sichul Lee [Corée du Sud] ; Yunjung Choi [Corée du Sud] ; Gynheung An [Corée du Sud] ; Enrico Martinoia [Corée du Sud, Suisse] ; Youngsook Lee [Corée du Sud]

Source :

The Plant Cell [ 1040-4651 ] ; 2009.

RBID : PMC:2814514

Abstract

Cadmium (Cd) is a widespread soil pollutant; thus, the underlying molecular controls of plant Cd tolerance are of substantial interest. A screen for wheat (Triticum aestivum) genes that confer Cd tolerance to a Cd hypersensitive yeast strain identified Heat shock transcription factor A4a (HsfA4a). Ta HsfA4a is most similar to the class A4 Hsfs from monocots. The most closely related rice (Oryza sativa) homolog, Os HsfA4a, conferred Cd tolerance in yeast, as did Ta HsfA4a, but the second most closely related rice homolog, Os HsfA4d, did not. Cd tolerance was enhanced in rice plants expressing Ta HsfA4a and decreased in rice plants with knocked-down expression of Os HsfA4a. An analysis of the functional domain using chimeric proteins constructed from Ta HsfA4a and Os HsfA4d revealed that the DNA binding domain (DBD) of HsfA4a is critical for Cd tolerance, and within the DBD, Ala-31 and Leu-42 are important for Cd tolerance. Moreover, Ta HsfA4a–mediated Cd resistance in yeast requires metallothionein (MT). In the roots of wheat and rice, Cd stress caused increases in HsfA4a expression, together the MT genes. Our findings thus suggest that HsfA4a of wheat and rice confers Cd tolerance by upregulating MT gene expression in planta.

Url:

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2814514

DOI: 10.1105/tpc.109.066902
PubMed: 20028842
PubMed Central: 2814514

Affiliations:

Le document en format XML

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<author><name sortKey="Lee, Sichul" sort="Lee, Sichul" uniqKey="Lee S" first="Sichul" last="Lee">Sichul Lee</name>
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<author><name sortKey="Choi, Yunjung" sort="Choi, Yunjung" uniqKey="Choi Y" first="Yunjung" last="Choi">Yunjung Choi</name>
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<author><name sortKey="Lee, Youngsook" sort="Lee, Youngsook" uniqKey="Lee Y" first="Youngsook" last="Lee">Youngsook Lee</name>
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<series><title level="j">The Plant Cell</title>
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<front><div type="abstract" xml:lang="en"><p>Cadmium (Cd) is a widespread soil pollutant; thus, the underlying molecular controls of plant Cd tolerance are of substantial interest. A screen for wheat (<italic>Triticum aestivum</italic>
) genes that confer Cd tolerance to a Cd hypersensitive yeast strain identified <italic>Heat shock transcription factor A4a</italic>
 (<italic>HsfA4a</italic>
). Ta HsfA4a is most similar to the class A4 Hsfs from monocots. The most closely related rice (<italic>Oryza sativa</italic>
) homolog, Os HsfA4a, conferred Cd tolerance in yeast, as did Ta HsfA4a, but the second most closely related rice homolog, Os HsfA4d, did not. Cd tolerance was enhanced in rice plants expressing Ta HsfA4a and decreased in rice plants with knocked-down expression of Os HsfA4a. An analysis of the functional domain using chimeric proteins constructed from Ta HsfA4a and Os HsfA4d revealed that the DNA binding domain (DBD) of HsfA4a is critical for Cd tolerance, and within the DBD, Ala-31 and Leu-42 are important for Cd tolerance. Moreover, Ta HsfA4a–mediated Cd resistance in yeast requires metallothionein (MT). In the roots of wheat and rice, Cd stress caused increases in <italic>HsfA4a</italic>
 expression, together the <italic>MT</italic>
 genes. Our findings thus suggest that HsfA4a of wheat and rice confers Cd tolerance by upregulating <italic>MT</italic>
 gene expression in planta.</p>
</div>
</front>
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<name sortKey="Hwang, Jae Ung" sort="Hwang, Jae Ung" uniqKey="Hwang J" first="Jae-Ung" last="Hwang">Jae-Ung Hwang</name>
<name sortKey="Lee, Joohyun" sort="Lee, Joohyun" uniqKey="Lee J" first="Joohyun" last="Lee">Joohyun Lee</name>
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<name sortKey="Martinoia, Enrico" sort="Martinoia, Enrico" uniqKey="Martinoia E" first="Enrico" last="Martinoia">Enrico Martinoia</name>
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<country name="Suisse"><region name="Canton de Zurich"><name sortKey="Martinoia, Enrico" sort="Martinoia, Enrico" uniqKey="Martinoia E" first="Enrico" last="Martinoia">Enrico Martinoia</name>
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Orthologs of the Class A4 Heat Shock Transcription Factor HsfA4a Confer Cadmium Tolerance in Wheat and Rice[C][W]

Orthologs of the Class A4 Heat Shock Transcription Factor HsfA4a Confer Cadmium Tolerance in Wheat and Rice[C][W]

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Abstract

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