Impact of Annual Temperature Variation on Distribution and Year-round Concentration Variation of Paulownia Witches' Broom Phytoplasma
CAO Yabing
ZHAI Xiaoqiao
JIE Dawei
FAN Guoqiang
Abstract：To explore the effect of temperature variation on the distribution of witches' broom phytoplas-ma and its annual changes of relative content in paulownia,direct-RCR and nest-PCR were used to re-search the seasonal variation of the phytoplasma content and distribution. Our result showed that the distri-bution of phytoplasma in varying degree of diseased paulownia was different,meanwhile the concentration in different organs of the same plant was not the same. In the moderately diseased plant,phytoplasma sur-vived all the year round in branches and increased gradually with the rising of temperature. The highest concentration of phytoplasma appeared in August, and subsequently, the concentration of phytoplasma gradually decreased. The similar situation appeared in leaves,except that the concentration of phytoplasma reached the maximum in July and the minimum in October. In root, the phytoplasma concentration was lower and changed less than in leaves and branches,which reached the maximum in September,and then reduced. In all,the relationship between the variation of phytoplasma concentration in paulownia and an-nual changes of temperature was very close.
Keywords：paulownia witches' broom phytoplasmaPCRtemperaturevariation
Publication Date：2016-09-30
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：5( 85-88,97 )