Department of Plant Physiology, Faculty of Sciences, University of Granada, Granada, Spain.
Phytochemistry. 2011 Jun;72(8):723-9. doi: 10.1016/j.phytochem.2011.02.011. Epub 2011 Mar 17.
Different tomato cultivars (Solanum lycopersicum L.) with differences in tolerance to drought were subjected to moderate water stress to test the effects on flavonoids and caffeoyl derivatives and related enzymes. Our results indicate that water stress resulted in decreased shikimate pathway (DAHP synthase, shikimate dehydrogenase, phenylalanine ammonium lyase, cinnamate 4-hydroxylase, 4-coumarate CoA ligase) and phenolic compounds (caffeoylquinic acid derivatives, quercetin and kaempferol) in the cultivars more sensitive to water stress. However, cv. Zarina is more tolerant, and registered a rise in querc-3-rut-pent, kaempferol-3-api-rut, and kaempferol-3-rut under the treatment of water stress. Moreover, this cultivar show increased activities of flavonoid and phenylpropanoid synthesis and decreased in degradation-related enzymes. These results show that moderate water stress can induce shikimate pathway in tolerant cultivar.
不同耐干旱番茄品种（Solanum lycopersicum L.）在适度水分胁迫下，研究对类黄酮和咖啡酰衍生物及相关酶的影响。结果表明，水分胁迫导致对水分胁迫更敏感的品种中莽草酸途径（DAHP 合酶、莽草酸脱氢酶、苯丙氨酸氨裂解酶、肉桂酸 4-羟化酶、4-香豆酸辅酶 A 连接酶）和酚类化合物（咖啡酰奎宁酸衍生物、槲皮素和山柰酚）减少。然而，品种 Zarina 更具耐受性，在水分胁迫处理下，槲皮素-3-芸香基-五、山柰酚-3-阿魏酰-芸香基、山柰酚-3-芸香基的含量增加。此外，该品种表现出类黄酮和苯丙烷生物合成活性增加，降解相关酶活性降低。这些结果表明，适度水分胁迫可以诱导耐性品种中莽草酸途径的产生。
