The Effects of Different Altitudes on the Physiological Changes of Oriental Lily Bulbs during Dormancy Releasing

文献类型： 外文期刊

第一作者： Mu Ding

作者： Mu Ding;Du Yusong;Fan Yanyana;Zhang Yixian

作者机构：

关键词： bulb;dormancy;lily;physiological change

期刊名称：XI INTERNATIONAL SYMPOSIUM ON FLOWER BULBS AND HERBACEOUS PERENNIALS

ISSN： 0567-7572

年卷期： 2013 年 1002 卷

页码：

收录情况： SCI

摘要： This experiment was conducted to investigate the effects of different altitudes on dormancy and dormancy breaking of lily bulb. The cultivars 'Sorbonne' and 'Siberia' were used. The bulbs from the region of different altitudes, 2300 and 1900 m, were stored in moist peat moss for 9 weeks under 4 degrees C. The sucrose contents appeared increased firstly and decreased later in various parts of the bulbs. Sucrose contents in the daughter bulb and growing point of the bulb from higher altitude reached the highest level earlier than that from lower altitude. The sucrose related enzyme activeness was risen up. At the time of dormancy broken, SS (sucrose synthase) activeness achieved the maximum, and the SPS (sucrose phosphate synthase) achieved the maximum before dormancy broken. The Inv (invertase) activeness showed a rising tendency during the cold treatment. The daughter bulb's enzyme is higher than that of the mother bulb exactly, and the growing point's enzyme activity was higher than that of the inner layer and the outer layer scales. But the enzyme activeness of the bulbs from different altitude had little difference. We found the soluble solid contents similar with the sucrose content, when soluble solid contents achieved a peak, the bulb's dormancy was broken. The bulbs from lower altitude needed longer time than that from higher latitude for dormancy releasing under 4 degrees C treatment. The time of dormancy releasing of the bulbs of 'Siberia' and 'Sorbonne' from altitude 2300 m needed 6 weeks, whereas, that from 1900 m needed only 4 weeks in our experiment. The time length of dormancy breaking of the bulbs in our experiments was much shorter than that of the normal ones. We think that it is because the bulbs stayed in the field too long, but were not dug out on their right time of maturity. On the other hand, our experiments showed that although the value of soluble solid contents measured by refractometer does not equal to the soluble sugar content, it can be as a basis of determining the dormancy breaking of lily bulbs.

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