Welcome to Chinese Journal of Tropical Crops,

Chinese Journal of Tropical Crops ›› 2020, Vol. 41 ›› Issue (2): 359-364.DOI: 10.3969/j.issn.1000-2561.2020.02.021

• Crop Pests, Diseases and Their Control, Environmental Protection • Previous Articles     Next Articles

Accumulation of Lxx in Infected Sugarcane Stem and Its Effect on Structure of Sugarcane Stem

GUO Ying,LIN Zhikai,WANG Wenhua,LIU Liqing,HE Enming   

  1. Fujian Institute of Subtropical Botany / Fujian Key Laboratory of Subtropical Plant Physiology and Biochemistry, Xiamen, Fujian 361006, China
  • Received:2019-06-03 Revised:2019-06-18 Online:2020-02-25 Published:2020-03-21

Abstract:

Sugarcane variety ‘Badila’ which infected with Leifsonia xyli subsp. xyli (Lxx) was used as the materials in this research. The accumulation of Lxx in sugarcane stems was studied by real-time qPCR. And the pathological changes of vascular bundle of stems were studied by the semi-thin section technique. The results showed that the accumulation of Lxx decreased from the base layer to the tail layer in ‘Badila’. Severe damage to phloem and xylem in the vascular tissue of the base of sugarcane stems. The basal cells between the stem nodes were much smaller than those between the stems. The xylem was heteromorphism, the cell of xylem was different in size and arranged tightly. The damage of phloem and xylem in the vascular tissue of sugarcane stem infected with Lxx was positively correlated with the distribution of Lxx. It was speculated that the structure difference between the stem node and stem was one of the reasons why the quantity of Lxx decreased from the base layer to the tail layer. It would provide a theoretical basis for the further study of the interaction between bacterial of Lxx and sugarcane hosts.

Key words: sugarcane, ratoon stuning disease, Leifsonia xyli subsp. xyli (Lxx), real-time qPCR, semi-thin section

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