A mechanism for inducing plant development: The genesis of a specific inhibitor
A mechanism for inducing plant development: The genesis of a specific inhibitor
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DOI：
10.1073/pnas.93.14.6986
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发表时间：
1996-07-09
影响因子：
11.1
通讯作者：
Lynn, DG
中科院分区：
文献类型：
--
作者：
Smith, CE;Ruttledge, T;Lynn, DG
寄生策略广泛分布于植物界，经常涉及将寄生器官发生与寄主提示相结合。例如，在亚洲植物中，启动寄主附着器官吸器发育的线索起源于寄主，并在根分生组织中触发从营养模式到寄生模式的转换。因此，这个系统为研究控制植物细胞形态发生的信号和机制提供了一个独特的机会。在这里，我们证明了天然诱导剂的结构类似物的生物活性明显地依赖于氧化还原电位，并暗示了半喹酮中间体的存在。环丙基对苯二酚(CPBQ)建立在利用这种中间体的能量学的化学基础上，被证明是吸器发育的特异性抑制剂。这些数据与吸器发育是通过氧化还原回路的完成而启动的模型一致。
Parasitic strategies are widely distributed in the plant kingdom and frequently involve coupling parasite organogenesis with cues from the host. In Striga asiatica, for example, the cues that initiate the development of the host attachment organ, the haustorium, originate in the host and trigger the transition from vegetative to parasitic mode in the root meristem. This system therefore offers a unique opportunity to study the signals and mechanisms that control plant cell morphogenesis. Here we establish that the biological activity of structural analogs of the natural inducer displays a marked dependence on redox potential and suggest the existence of a semiquinone intermediate. Building on chemistry that exploits the energetics of such an intermediate, cyclopropyl-p-benzoquinone (CPBQ) is shown to be a specific inhibitor of haustorial development. These data are consistent with a model where haustorial development is initiated by the completion of a redox circuit.