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Light controls phospholipase A2 and gene expression in Citrus sinensis

Identifieur interne : 001B38 ( Main/Curation ); précédent : 001B37; suivant : 001B39

Light controls phospholipase A2 and gene expression in Citrus sinensis

Auteurs : Hui-Ling Liao [États-Unis] ; Jacqueline K. Burns [États-Unis]

Source :

Journal of Experimental Botany [ 0022-0957 ] ; 2010-05.

RBID : ISTEX:894A49DB9B49C2FB7B95D57E87B820651297ECDA

Descripteurs français

Pascal (Inist)
- Botanique, Citrus sinensis, Expression génique, Facteur photique, Phospholipase, Photorégulation.
Wicri :
- topic : Botanique.

English descriptors

KwdEn :
- Amino Acid Sequence, Base Sequence, Botany, Citrus sinensis, Citrus sinensis (chemistry), Citrus sinensis (enzymology), Citrus sinensis (genetics), Citrus sinensis (radiation effects), Darkness, Gene Expression Regulation, Enzymologic (radiation effects), Gene expression, Group IV Phospholipases A2 (chemistry), Group IV Phospholipases A2 (genetics), Group IV Phospholipases A2 (metabolism), Light, Light effect, Molecular Sequence Data, Phospholipase, Photoregulation, Plant Proteins (chemistry), Plant Proteins (genetics), Plant Proteins (metabolism), Protein Isoforms (genetics), Protein Isoforms (metabolism), Sequence Alignment.
MESH :
- chemical , chemistry : Group IV Phospholipases A2, Plant Proteins.
- chemistry : Citrus sinensis.
- enzymology : Citrus sinensis.
- genetics : Citrus sinensis, Group IV Phospholipases A2, Plant Proteins, Protein Isoforms.
- chemical , metabolism : Group IV Phospholipases A2, Plant Proteins, Protein Isoforms.
- radiation effects : Citrus sinensis, Gene Expression Regulation, Enzymologic.
- Amino Acid Sequence, Base Sequence, Darkness, Light, Molecular Sequence Data, Sequence Alignment.

Abstract

The low-molecular weight secretory phospholipase A2 (CssPLA2) and (CsPLA2) cloned in this study exhibited diurnal rhythmicity in leaf tissue of Citrus sinensis. Only CssPLA2 displayed distinct diurnal patterns in fruit tissues. CssPLA2 and CsPLA2 diurnal expression exhibited periods of approximately 24 h; CssPLA2 amplitude averaged 990-fold in the leaf blades from field-grown trees, whereas CsPLA2 amplitude averaged 6.4-fold. Diurnal oscillation of CssPLA2 and CsPLA2 gene expression in the growth chamber experiments was markedly dampened 24 h after transfer to continuous light or dark conditions. CssPLA2 and CsPLA2 expressions were redundantly mediated by blue, green, red and red/far-red light, but blue light was a major factor affecting CssPLA2 and CsPLA2 expression. Total and low molecular weight CsPLA2 enzyme activity closely followed diurnal changes in CssPLA2 transcript expression in leaf blades of seedlings treated with low intensity blue light (24 mol m2 s1). Compared with CssPLA2 basal expression, CsPLA2 expression was at least 10-fold higher. Diurnal fluctuation and light regulation of PLA2 gene expression and enzyme activity in citrus leaf and fruit tissues suggests that accompanying diurnal changes in lipophilic second messengers participate in the regulation of physiological processes associated with phospholipase A2 action.

Url:

DOI: 10.1093/jxb/erq083

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<front><div type="abstract">The low-molecular weight secretory phospholipase A2 (CssPLA2) and (CsPLA2) cloned in this study exhibited diurnal rhythmicity in leaf tissue of Citrus sinensis. Only CssPLA2 displayed distinct diurnal patterns in fruit tissues. CssPLA2 and CsPLA2 diurnal expression exhibited periods of approximately 24 h; CssPLA2 amplitude averaged 990-fold in the leaf blades from field-grown trees, whereas CsPLA2 amplitude averaged 6.4-fold. Diurnal oscillation of CssPLA2 and CsPLA2 gene expression in the growth chamber experiments was markedly dampened 24 h after transfer to continuous light or dark conditions. CssPLA2 and CsPLA2 expressions were redundantly mediated by blue, green, red and red/far-red light, but blue light was a major factor affecting CssPLA2 and CsPLA2 expression. Total and low molecular weight CsPLA2 enzyme activity closely followed diurnal changes in CssPLA2 transcript expression in leaf blades of seedlings treated with low intensity blue light (24 mol m2 s1). Compared with CssPLA2 basal expression, CsPLA2 expression was at least 10-fold higher. Diurnal fluctuation and light regulation of PLA2 gene expression and enzyme activity in citrus leaf and fruit tissues suggests that accompanying diurnal changes in lipophilic second messengers participate in the regulation of physiological processes associated with phospholipase A2 action.</div>
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<front><div type="abstract" xml:lang="en">The low-molecular weight secretory phospholipase A<sub>2</sub>
α (CssPLA<sub>2</sub>
α) and β (CsPLA<sub>2</sub>
β) cloned in this study exhibited diurnal rhythmicity in leaf tissue of Citrus sinensis. Only CssPLA<sub>2</sub>
α displayed distinct diurnal patterns in fruit tissues. CssPLA<sub>2</sub>
α and CsPLA<sub>2</sub>
β diurnal expression exhibited periods of approximately 24 h; CssPLA<sub>2</sub>
α amplitude averaged 990-fold in the leaf blades from field-grown trees, whereas CsPLA<sub>2</sub>
β amplitude averaged 6.4-fold. Diurnal oscillation of CssPLA<sub>2</sub>
α and CsPLA<sub>2</sub>
β gene expression in the growth chamber experiments was markedly dampened 24 h after transfer to continuous light or dark conditions. CssPLA<sub>2</sub>
α and CsPLA<sub>2</sub>
β expressions were redundantly mediated by blue, green, red and red/far-red light, but blue light was a major factor affecting CssPLA<sub>2</sub>
α and CsPLA<sub>2</sub>
β expression. Total and low molecular weight CsPLA<sub>2</sub>
 enzyme activity closely followed diurnal changes in CssPLA<sub>2</sub>
α transcript expression in leaf blades of seedlings treated with low intensity blue light (24 μmol m<sup>-2</sup>
 s<sup>-1</sup>
). Compared with CssPLA<sub>2</sub>
α basal expression, CsPLA<sub>2</sub>
β expression was at least 10-fold higher. Diurnal fluctuation and light regulation of PLA<sub>2</sub>
 gene expression and enzyme activity in citrus leaf and fruit tissues suggests that accompanying diurnal changes in lipophilic second messengers participate in the regulation of physiological processes associated with phospholipase A<sub>2</sub>
 action.</div>
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<term>Protein Isoforms (genetics)</term>
<term>Protein Isoforms (metabolism)</term>
<term>Sequence Alignment</term>
</keywords>
<keywords scheme="MESH" type="chemical" qualifier="chemistry" xml:lang="en"><term>Group IV Phospholipases A2</term>
<term>Plant Proteins</term>
</keywords>
<keywords scheme="MESH" qualifier="chemistry" xml:lang="en"><term>Citrus sinensis</term>
</keywords>
<keywords scheme="MESH" qualifier="enzymology" xml:lang="en"><term>Citrus sinensis</term>
</keywords>
<keywords scheme="MESH" qualifier="genetics" xml:lang="en"><term>Citrus sinensis</term>
<term>Group IV Phospholipases A2</term>
<term>Plant Proteins</term>
<term>Protein Isoforms</term>
</keywords>
<keywords scheme="MESH" type="chemical" qualifier="metabolism" xml:lang="en"><term>Group IV Phospholipases A2</term>
<term>Plant Proteins</term>
<term>Protein Isoforms</term>
</keywords>
<keywords scheme="MESH" qualifier="radiation effects" xml:lang="en"><term>Citrus sinensis</term>
<term>Gene Expression Regulation, Enzymologic</term>
</keywords>
<keywords scheme="MESH" xml:lang="en"><term>Amino Acid Sequence</term>
<term>Base Sequence</term>
<term>Darkness</term>
<term>Light</term>
<term>Molecular Sequence Data</term>
<term>Sequence Alignment</term>
</keywords>
</textClass>
<langUsage><language ident="en">en</language>
</langUsage>
</profileDesc>
</teiHeader>
<front><div type="abstract">The low-molecular weight secretory phospholipase A2 (CssPLA2) and (CsPLA2) cloned in this study exhibited diurnal rhythmicity in leaf tissue of Citrus sinensis. Only CssPLA2 displayed distinct diurnal patterns in fruit tissues. CssPLA2 and CsPLA2 diurnal expression exhibited periods of approximately 24 h; CssPLA2 amplitude averaged 990-fold in the leaf blades from field-grown trees, whereas CsPLA2 amplitude averaged 6.4-fold. Diurnal oscillation of CssPLA2 and CsPLA2 gene expression in the growth chamber experiments was markedly dampened 24 h after transfer to continuous light or dark conditions. CssPLA2 and CsPLA2 expressions were redundantly mediated by blue, green, red and red/far-red light, but blue light was a major factor affecting CssPLA2 and CsPLA2 expression. Total and low molecular weight CsPLA2 enzyme activity closely followed diurnal changes in CssPLA2 transcript expression in leaf blades of seedlings treated with low intensity blue light (24 mol m2 s1). Compared with CssPLA2 basal expression, CsPLA2 expression was at least 10-fold higher. Diurnal fluctuation and light regulation of PLA2 gene expression and enzyme activity in citrus leaf and fruit tissues suggests that accompanying diurnal changes in lipophilic second messengers participate in the regulation of physiological processes associated with phospholipase A2 action.</div>
</front>
</TEI>
</ISTEX>
</double>
</record>

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Light controls phospholipase A2 and gene expression in Citrus sinensis

Light controls phospholipase A2 and gene expression in Citrus sinensis

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