Depression of enzyme activities and gene expression of ACC synthase and ACC oxidase in cut carnation flowers under high-temperature conditions
Depression of enzyme activities and gene expression of ACC synthase and ACC oxidase in cut carnation flowers under high-temperature conditions
复制标题
DOI：
10.1007/s10725-007-9213-z
复制
发表时间：
2007-08
影响因子：
4.2
通讯作者：
P. Yangkhamman;K. Tanase;K. Ichimura;S. Fukai
中科院分区：
文献类型：
--
作者：
P. Yangkhamman;K. Tanase;K. Ichimura;S. Fukai
香石竹切花乙烯产生之高温抑制。花中ACC合酶（ACS）和ACC氧化酶（ACO）活性受到抑制，可导致“异花症”的发生。在24°C和32°C下，花瓣中ACS活性之间存在明显差异。在32°C下，花瓣中ACC积累相关的活性显著降低，表明花瓣中ACS活性和ACC积累的降低是高温条件下乙烯生物合成抑制的一个因素。此外，DC-ACO 1和DC-ACS 1在32°C下的雌蕊和花瓣中的表达量均较低。结果表明，在高温条件下低ACS和ACO活动的转录调控。
High-temperature depression of ethylene production in cut carnation flowers cv. ‘Excerea’ can occur because of inhibition of ACC synthase (ACS) and ACC oxidase (ACO) activities in flowers. Large differences were apparent between ACS activity in petals at 24°C and 32°C. These ACC-accumulation-related activities were markedly decreased in petals at 32°C, indicating that a low ACS activity and ACC accumulation in petals are a factor of ethylene biosynthesis inhibition under high-temperature conditions. In addition, the respective expressions ofDC-ACO1andDC-ACS1were low in both gynoecia and petals of flowers kept at 32°C. Results indicate that low ACS and ACO activities under high-temperature conditions were transcriptionally regulated.