Inflorescence bud proteins of Pistacia vera |
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Authors: | A Golan-Goldhirsh Irena Peri Yehudith Birk Patricia Smirnoff |
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Institution: | (1) Ben-Gurion University of the Negev, The Jacob Blaustein Institute for Desert Research, The Albert Katz Center for Desert Agrobiology, Desert Plant Biotechnology Laboratory, Sede Boker Campus 84990, Israel, IL;(2) The Hebrew University of Jerusalem, Institute of Biochemistry, Food Science & Nutrition, Rehovot 76100, Israel, IL |
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Abstract: | The Pistacia vera L. (common name pistachio) is a unique dioecious and deciduous tree species, which is productive under harsh desert climates.
We have identified and purified an Inflorescence Bud Protein of 32 kDa (IBP32) from male pistachio trees. There is a close
correlation between its accumulation and inflorescence bud development and its disappearance and flowering. Using antibodies
raised against this protein, we have identified in female trees the IBP32 and in addition a 27 kDa protein (IBP27), which
appears to be specific to female inflorescence buds. The accumulation and disappearance of IBP27 follows the same pattern
as that of IBP32. These proteins are glycoproteins rich in glycine and alanine and are highly hydrophilic. Based on the analytical
results and immunological cross-reactivity between dehydrin antibodies and the IBPs, it is assumed that the latter are dehydrin-like
and may protect inflorescence bud meristems against cold injury during dormancy. The IBPs are the major proteins of the pistachio
bud, therefore they may also serve as nitrogen storage during winter for inflorescence bud growth in spring.
Received: 17 October 1997 / Accepted: 6 March 1998 |
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Keywords: | Inflorescence bud proteins Antibodies Dormancy Deciduous Dioecious |
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