Gibberellin precursor is involved in spore germination in the moss Physcomitrella patens
Gibberellin precursor is involved in spore germination in the moss Physcomitrella patens
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DOI：
10.1007/s00425-008-0875-1
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发表时间：
2009-03-01
期刊：
影响因子：
4.3
通讯作者：
Renzaglia, Karen
中科院分区：
文献类型：
--
作者：
Anterola, Aldwin;Shanle, Erin;Renzaglia, Karen
赤霉素是由ent-kaurene衍生的植物激素，参与种子植物的种子萌发、茎伸长和花诱导，以及蕨类植物的孢子形成和孢子萌发。尽管赤霉素在维管植物中普遍存在，但其在苔藓植物中的存在及其潜在功能尚未得到明确的研究。为了确定赤霉素和/或赤霉素样化合物在苔藓中的潜在作用，研究了AMO-1618对小立小霉孢子的影响。bsg接受了测试。AMO-1618在抑制被子植物对-丁香烯和赤霉素合成的同时，也抑制了植物双功能共酚二磷酸合成酶(E.C. 5.5.1.13)/对-丁香烯合成酶（E.C. 4.2.3.19）。AMO-1618也能降低专利假单胞菌的孢子发芽率，但这种抑制作用在含有对苯二烯的情况下不明显。这些结果表明，ent-kaurene的生物合成是patens孢子发芽所必需的，这意味着苔藓中存在类似赤霉素的植物激素。
Gibberellins are ent-kaurene derived phytohormones that are involved in seed germination, stem elongation, and flower induction in seed plants, as well as in antheridia formation and spore germination in ferns. Although ubiquitous in vascular plants, the occurrence and potential function(s) of gibberellins in bryophytes have not yet been resolved. To determine the potential role of gibberellin and/or gibberellin-like compounds in mosses, the effect of AMO-1618 on spores of Physcomitrella patens (Hedw.) B.S.G. was tested. AMO-1618, which inhibited ent-kaurene and gibberellin biosynthesis in angiosperms, also inhibited the bifunctional copalyl diphosphate synthase (E.C. 5.5.1.13)/ent-kaurene synthase (E.C. 4.2.3.19) of P. patens. AMO-1618 also caused a decrease in spore germination rates of P. patens, and this inhibitory effect was less pronounced in the presence of ent-kaurene. These results suggest that ent-kaurene biosynthesis is required by P. patens spores to germinate, implying the presence of gibberellin-like phytohormones in mosses.