%0 Journal Article
%T Cold hardiness of Pinus ponderosa, P. banksian and P. tabulaeformis<br>美国黄松、班克松和油松的抗寒性比较
%A GONG Yuehua
%A ZHOU Yongxue
%A FAN Junfeng
%A LIU Yingzhou
%A PANG Kejia
%A <br>龚月桦
%A 周永学
%A 樊军锋
%A 刘迎洲
%A 庞珂佳
%J 应用生态学报
%D 2006
%I 
%X By the method of artificial freezing, this paper made a comparative study on the cold hardiness of Pinus ponderosa, P. banksiana and P. tabulaeformis, with their inherent mechanisms approached. The results showed that the cold hardiness of these three species was in the sequence of P. banksiana > P. tabulaeformis > P. ponderosa. P. banksiana had high bound water/free water ratio (7.0) and ABA content (164.3 microg x g(-1) FW) but low K+ (2450 microg x g(-1) DW) and soluble sugar (12.0%) , P. tabulaeformis had higher contents of ABA (95.8 microg x g(-1) FW), K+ (4538 microg x g(-1) DW) and soluble sugar (18.68%) but low bound water/free water ratio (2.58), while P. ponderosa had high soluble sugar content (18.05%) but low bound water/free water ratio (2.18) and K+ (2275 microg x g(-1) DW) and ABA (63.3 microg x g(-1) FW) contents. These differences might be the reasons resulting in the different cold hardiness of these three species. Low chlorophyll content and high carotenoid/chlorophyll ratio might also contribute to the cold hardiness of P. banksiana. Therefore, though the test species are all of cold hardiness, their inherent mechanisms may be different.
%K ABA<br>美国黄松
%K 班克松
%K 油松
%K 抗寒性
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=42FEDDFE54F8BCD9D5FD1926ABDD7722&aid=1DA497DEEDCE0E60&yid=37904DC365DD7266&vid=BCA2697F357F2001&iid=5D311CA918CA9A03&sid=79D108842269596A&eid=FEF59218C1413604&journal_id=1001-9332&journal_name=应用生态学报&referenced_num=3&reference_num=28