Shiu O Y, Oetiker J H, Yip W K, Yang S F
Department of Vegetable Crops, University of California, Davis, CA 95616, USA.
Proc Natl Acad Sci U S A. 1998 Aug 18;95(17):10334-9. doi: 10.1073/pnas.95.17.10334.
Many terrestrial plants respond to flooding with enhanced ethylene production. The roots of flooded plants produce 1-aminocyclopropane-1-carboxylic acid (ACC), which is transported from the root to the shoot, where it is converted to ethylene. In the roots, ACC is synthesized by ACC synthase, which is encoded by a multigene family. Previously, we identified two ACC synthase genes of tomato that are involved in flooding-induced ethylene production. Here, we report the cloning of LE-ACS7, a new tomato ACC synthase with a role early during flooding but also in the early wound response of leaves. The promoter of LE-ACS7 is tagged by a Sol3 transposon. A Sol3 transposon is also present in the tomato polygalacturonase promoter to which it conferred regulatory elements. Thus, Sol3 transposons may affect the regulation of LE-ACS7 and may be involved in the communication between the root and the shoot of waterlogged tomato plants.
许多陆生植物对水淹的反应是乙烯产量增加。水淹植物的根产生1-氨基环丙烷-1-羧酸（ACC），它从根运输到地上部分，在那里转化为乙烯。在根中，ACC由ACC合酶合成，ACC合酶由一个多基因家族编码。此前，我们鉴定了番茄中两个参与水淹诱导乙烯产生的ACC合酶基因。在这里，我们报告了LE-ACS7的克隆，它是一种新的番茄ACC合酶，在水淹早期以及叶片的早期伤口反应中起作用。LE-ACS7的启动子被一个Sol3转座子标记。番茄多聚半乳糖醛酸酶启动子中也存在一个Sol3转座子，它赋予该启动子调控元件。因此，Sol3转座子可能影响LE-ACS7的调控，并可能参与水淹番茄植株根和地上部分之间的信号传递。
