[Transcriptional levels of AQPs genes in peach floral buds during dormancy].
Taking the floral buds of 10 years old field-cultivated and 3 years old potted nectarine (Prunus persica var. nectarine cv. Shuguang) as test materials, and by the method of real-time quantitative PCR, this paper studied the expressions of the AQPs genes deltaTIP1 and PIP1; 1 during dormancy and dormancy-release (September 15, 2009-January 15, 2010) and the transcriptional levels of the genes under low temperature stress. Within the period of dormancy and dormancy-release, the transcriptional level of PIP1; 1 presented a persistent increasing trend, and the high level expression of PIP1; 1 in January could be related to the efflux of water through cytoplasma membrane and vacuolar membrane, which protected the bud cells from ice crystal injuries. The contents of soluble sugar, soluble protein, and proline in the bud cells all peaked in January, which prevented the excessive water loss from the cells. After 2 weeks of low temperature treatment, the PIP1; 1 had a high level expression, indicating that it was a cold-induced gene. The transcriptional level of deltaTIP1 fluctuated during dormancy, and increased significantly during dormancy-release, which might be induced by the dormancy-release signals in buds and the resumption of plant activity. After 2 weeks of low temperature treatment, the expression level of deltaTIP1 had no increase, indicating that deltaTIP1 was not a cold-induced gene.
College of Horticulture Science and Engineering, State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai'an 271018, Shandong, China. lilingsdau@163.com
Ling
L
Li
Yue
Y
Tan
Hui
H
Wang
Chuan-Yuan
CY
Leng
Dong-Mei
DM
Li
Xiu-De
XD
Chen
Dong-Sheng
DS
Gao
D020346:Aquaporins / Q000235:genetics / Q000378:metabolism*; D003080:Cold Temperature; D035264:Flowers / Q000254:growth & development / Q000378:metabolism; D018506:Gene Expression Regulation, Plant / Q000187:drug effects / Q000235:genetics; D057445:Plant Dormancy / Q000235:genetics*; D027861:Prunus / Q000235:genetics / Q000378:metabolism* / Q000502:physiology*; D013312:Stress, Physiological; D014158:Transcription, Genetic
D020346:Aquaporins