ALKALOIDAL RESPONSES TO DAMAGE IN NICOTIANA NATIVE TO NORTH-AMERICA
ALKALOIDAL RESPONSES TO DAMAGE IN NICOTIANA NATIVE TO NORTH-AMERICA
复制标题
DOI：
10.1007/bf00987376
复制
发表时间：
1993-06-01
影响因子：
2.3
通讯作者：
OHNMEISS, TE
中科院分区：
文献类型：
--
作者：
BALDWIN, IT;OHNMEISS, TE
我们在犹他州西南部生长的烟草植株中进行了生物碱诱导的田间试验，模拟了无脊椎动物和脊椎动物草食动物造成的两种主要伤害类型：叶片伤害和茎切除。在未受损害的植物中，叶片尼古丁含量的季节性增加速度为叶片干质量/天的0.046%。叶害使累积速率增加一倍，达到叶干质量/天的0.086-0.138%，而去茎则使积累速率翻两番，达到叶干质量/天的0.206%。这些危害导致的尼古丁积累增加明显大于植物之间和物候期的差异。北美原产的去甲烟碱(N.repanda和N.trionophylla)和积聚异烟碱(N.gluca)烟草的叶片受害导致其主要叶片生物碱库增加1.5-5倍。我们的结论是，生物碱的诱导并不局限于积累尼古丁的烟草物种，取食先前受损植物的食草动物可能会遇到生物碱滴度显着高于未受损植物的组织。
We performed field tests of alkaloid induction in Nicotiana attenuata plants growing in southwestern Utah with mimicry of the two major types of damage inflicted by invertebrate and vertebrate herbivores: leaf damage and stalk removal, respectively. In undamaged plants, seasonal increases in leaf nicotine content occurred at a rate of 0.046% leaf dry mass/day. Leaf damage doubled the accumulation rate to 0.086-0.138% leaf dry mass/day, while stalk removal resulted in a quadrupling of the accumulation rate to 0.206% leaf dry mass/day. These damage-induced increases in nicotine accumulation are significantly larger than between-plant and phenological variations. Leaf damage to the nornicotine-(N. repanda and N. trigonophylla) and anabasine-accumulating (N. glauca) Nicotiana species native to North America resulted in 1.5- to 5-fold increases in their principal leaf alkaloid pools. We conclude that alkaloid induction is not limited to nicotine-accumulating Nicotiana species and that herbivores feeding on previously damaged plants are likely to encounter tissues with alkaloid titers significantly higher than those of undamaged plants.