...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >SNF1-related kinases allow plants to tolerate herbivory by allocating carbon to roots
【24h】

SNF1-related kinases allow plants to tolerate herbivory by allocating carbon to roots

机译：SNF1相关激酶可通过将碳分配到根部来使植物耐受草食动物

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Herbivore attack elicits costly defenses that are known to decrease plant fitness by using resources that are normally slated for growth and reproduction. Additionally, plants have evolved mechanisms for tolerating attack, which are not understood on a molecular level. Using C-11-photosynthate labeling as well as sugar and enzyme measurements, we found rapid changes in sink-source relations in the annual Nicotiana attenuata after simulated herbivore attacks, which increased the allocation of sugars to roots. This herbivore-induced response is regulated by the beta-subunit of an SnRK1 (SNF1-related kinase) protein kinase, GAL83, transcripts of which are rapidly down-regulated in source leaves after herbivore attack and, when silenced, increase assimilate transport to roots. This C diversion response is activated by herbivore-specific elicitors and is independent of jasmonate signaling, which regulates most of the plant's defense responses. Herbivore attack during early stages of development increases root reserves, which, in turn, delays senescence and prolongs flowering. That attacked GAL83-silenced plants use their enhanced root reserves to prolong reproduction demonstrates that SnRK1 alters resource allocation so that plants better tolerate herbivory. This tolerance mechanism complements the likely defensive value of diverting resources to a less vulnerable location within the plant.
机译：草食动物的攻击引发了代价高昂的防御，已知这些防御会通过使用通常用于生长和繁殖的资源来降低植物的适应性。另外，植物已经进化出耐受攻击的机制，这在分子水平上尚不为人所知。使用C-11-光合酶标记以及糖和酶的测量结果，我们发现在模拟食草动物袭击后一年生烟草弱烟中水库-源关系的快速变化，这增加了糖在根中的分配。食草动物诱导的应答受SnRK1（SNF1相关激酶）蛋白激酶GAL83的β亚基调控，食草动物攻击后其转录本在源叶中迅速下调，而沉默后其同化物向根的转运增加。这种C转移反应被草食动物特异性激发子激活，并且独立于茉莉酸酯信号传导，而茉莉酸酯信号传导调节了植物的大多数防御反应。在发展的早期，草食动物的攻击增加了根的储备，继而延缓了衰老并延长了开花时间。被攻击的GAL83沉默植物利用其增强的根系储备来延长繁殖，这表明SnRK1改变了资源分配，从而使植物更好地耐受草食动物。这种容忍机制补充了将资源转移到工厂中较不脆弱的位置的可能的防御价值。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号