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OALib Journal期刊
ISSN: 2333-9721
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光周期对油桃叶芽休眠诱导期抗氰呼吸的影响
DOI: 10.3724/SP.J.1145.2010.00775, PP. 775-778
Keywords: 光周期,油桃,叶芽,休眠诱导期,抗氰呼吸,交替途径
Abstract:
以油桃品种‘曙光’（prunuspersicavar.nectarianacv.shuguang）为试材，采用呼吸抑制剂法研究光周期处理下叶芽在休眠诱导期抗氰呼吸（交替途径）的发生、运行情况.结果表明：休眠诱导期内，叶芽总呼吸速率（vt）呈单峰变化，短日照使其降低，诱导高峰期前移，而长日照亦降低vt，但峰期后移.交替途径容量（valt）呈双峰曲线变化而实际运行活性（ρvalt）则为单峰曲线，两者后期变化不同步.自然低温和短日照共同作用可以显著诱导valt和ρvalt前期高峰期提前，显著降低后期valt和ρvalt.而长日照则对前期高峰具延迟效果，并有利于整个休眠诱导期ρvalt的提高.日照长度对叶芽后期valt高峰期迁移无明显作用.长日照有利于提高抗氰呼吸实际运行活力对总呼吸速率的贡献率，但抗氰呼吸不是主要的电子呼吸传递途径.图4表2参22
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