Preferential localization of abscisic acid in primordial and nursing cells of reproductive organs of Arabidopsis and cucumber

The New Phytologist
Yi-Ben PengShu-Nong Bai

Abstract

Abscisic acid (ABA) is known to function in plant stress responses and seed dormancy, and much is known about its detailed mechanisms of signal transduction. Recent studies suggest that this hormone may also play important roles in sugar signaling and assimilate distribution during fruit development. However, little is known about the role of ABA in actively growing or differentiating fruits and other plant organs or tissues. To explore whether ABA functions during the early development of reproductive organs, we carried out ABA immunolocalization using monoclonal antibodies. The specific ABA accumulation pattern was verified by gas chromatography-mass spectrometry (GC-MS). ABA was not only detected in primordial cells of flower organs, but was also detected in nursing cells (e.g. tapetum and integuments), which function in supplying nutrition for germ cell development. These findings suggest that, in addition to its well-known function as a 'negative hormone', ABA may play some 'positive' roles during plant development, including possible involvement in the regulation of assimilate distribution.

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Citations

Mar 27, 2009·Planta·Lisette Maria Catharina NitschWim Hendrik Vriezen
Oct 13, 2010·Journal of Experimental Botany·Minmin MiaoKuishan Wang
Sep 3, 2011·BMC Plant Biology·Krzysztof ZienkiewiczAntonio J Castro
Apr 29, 2014·Plant Science : an International Journal of Experimental Plant Biology·Kevin N BaronClaudio Stasolla
Apr 25, 2012·Plant Science : an International Journal of Experimental Plant Biology·Kevin N BaronClaudio Stasolla

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