Comprehensive Hormone Profiling in Developing Arabidopsis Seeds: Examination of the Site of ABA Biosynthesis, ABA Transport and Hormone Interactions
Comprehensive Hormone Profiling in Developing Arabidopsis Seeds: Examination of the Site of ABA Biosynthesis, ABA Transport and Hormone Interactions
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DOI：
10.1093/pcp/pcq158
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发表时间：
2010-12-01
影响因子：
4.9
通讯作者：
Seo, Mitsunori
中科院分区：
文献类型：
--
作者：
Kanno, Yuri;Jikumaru, Yusuke;Seo, Mitsunori
阿坝在种子发育过程中起着重要作用，包括贮藏物质的积累、脱水耐性的获得、诱导种子休眠和抑制早熟萌发等。阿坝的定量在F-1和F-2的人口起源于野生型和ABA缺陷突变体aba 2 -2之间的杂交表明，阿坝在种子发育过程中，在母体和合子组织合成。在合子阿坝缺乏的情况下，母体组织中合成的阿坝被转运到胚中并部分诱导种子休眠。我们还分析了阿坝代谢产物，赤霉素，IAA，细胞分裂素，茉莉酸和水杨酸（SA）的野生型和aba 2 -2的发展中的种子的水平。阿坝代谢产物积累差异角果和种子组织在发展过程中。内源SA水平升高aba 2 -2在后期的发展阶段，而IAA的野生型相比，减少。这些数据表明，阿坝代谢依赖于发育阶段和组织，阿坝与其他激素相互作用，以调节种子发育过程。
ABA plays important roles in many aspects of seed development, including accumulation of storage compounds, acquisition of desiccation tolerance, induction of seed dormancy and suppression of precocious germination. Quantification of ABA in the F-1 and F-2 populations originated from crosses between the wild type and an ABA-deficient mutant aba2-2 demonstrated that ABA was synthesized in both maternal and zygotic tissues during seed development. In the absence of zygotic ABA, ABA synthesized in maternal tissues was translocated into the embryos and partially induced seed dormancy. We also analyzed the levels of ABA metabolites, gibberellins, IAA, cytokinins, jasmonates and salicylic acid (SA) in the developing seeds of the wild type and aba2-2. ABA metabolites accumulated differentially in the silique and seed tissues during development. Endogenous levels of SA were elevated in aba2-2 in the later developmental stages, whereas that of IAA was reduced compared with the wild type. These data suggest that ABA metabolism depends on developmental stages and tissues, and that ABA interacts with other hormones to regulate seed developmental processes.