Subcellular distribution and tissue expression of phospholipase Dα, Dβ, and Dγ in arabidopsis
Plant Physiology, ISSN: 0032-0889, Vol: 119, Issue: 4, Page: 1371-1378
1999
- 107Citations
- 44Captures
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Metrics Details
- Citations107
- Citation Indexes107
- 107
- CrossRef83
- Captures44
- Readers44
- 32
- 12
Article Description
Three phospholipase Ds (PLDs; EC 3.1.4.4) have been cloned from Arabidopsis, and they exhibit two distinct types of activities: polyphosphoinositide-requiring PLDβ and PLDγ, and polyphosphoinositide-independent PLDα. In subcellular fractions of Arabidopsis leaves, PLDα and PLDγ were both present in the plasma membrane, intracellular membranes, mitochondria, and clathrin-coated vesicles, but their relative levels differed in these fractions. In addition, PLDγ was detected in the nuclear fraction. In contrast, PLDβ was not detectable in any of the subcellular fractions. PLDα activity was higher in the metabolically more active organs such as flowers, siliques, and roots than in dry seeds and mature leaves, whereas the polyphosphoinositide-dependent PLD activity was greater in older, senescing leaves than in other organs. PLDβ mRNA accumulated at a lower level than the PLDα and PLDγ transcripts in most organs, and the expression pattern of the PLDβ mRNA also differed from that of PLDα and PLDγ in different organs. Collectively, these data demonstrated that PLDα, PLDβ, and PLDγ have different patterns of subcellular distribution and tissue expression in Arabidopsis. The present study also provides evidence for the presence of an additional PLD that is structurally more closely related to PLDγ than to the other two PLDs.
Bibliographic Details
Oxford University Press (OUP)
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