+ Site Statistics
+ Search Articles
+ PDF Full Text Service
How our service works
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ Translate
+ Recently Requested

Interaction between the pathogen and host plants during the Pierces disease development of grapevines

Interaction between the pathogen and host plants during the Pierces disease development of grapevines

Hortscience 38(5): 687-688

Pierce's disease (PD) is a limited factor to production of non-native grapes in the southeastern United States. The disease has recently received national and international concerns due to its outbreak in California. Pierce's disease is caused by a bacterial pathogen known as Xylella fastidiosa (XF) which is transmitted by leaf hoppers when they feed on grapevines. It has generally been believed that clogging the xylem vessels by XF results in the typical PD symptoms: marginal necrosis, uneven lignifications of annual canes, abscissions occurring between leaf blades and petioles, and dead shoots. However, there are many unexplained phenomenon during the course of the disease development, and the real causes of PD maybe more complicated than water deficiency. In order to better understand the mechanism of the disease development and host plant resistance to PD infection, we have been investigating the pathogenesis of XF, interactions between XF and grapevine, variations and changes of plant growth regulators among PD resistant and susceptible grapes. It appeared that the PD symptom development associated with physiological and biochemical changes of grapevines. For example, both ABA and SA levels increased during the course of PD development. In the mean time, PD infected leaves showed various abnormalities with symptoms similar to mineral nutrient imbalances such as phosphorous (P) deficiency and magnesium (Mg), manganese (Mn) and iron (Fe) toxicities. In addition, the PD infected leaves and petioles showed significantly lower levels of K and higher levels of Fe, Cu, and Zn than those non-infected ones. In a separate study, when culture filtrates from X. fastidiosa were placed on wounded leaf segment, the susceptible cultivars showed severe symptoms while no or very mild symptoms were found on PD resistant cultivars. Two toxic compounds were also isolated from the XF culture filtrate. This result indicated that PD symptom development maybe associated in part with a toxic effect from X. fastidiosa. Our studies revealed that the PD development involves a series of complex interactions between the XF pathogen and the host plant, and many physiological and biochemical changes occured in the host plants during PD development.

Please choose payment method:

(PDF emailed within 1 workday: $29.90)

Accession: 035155034

Download citation: RISBibTeXText

Related references

The development and spread of Pierce's disease of grapevines. Phytopath 31(9): 862, 1941

Pierces disease of grapevines in mexico. Plant Disease 64(3): 280-282, 1980

Pierces disease--killer of grapevines. Wines and vines: 51 (11) 23-25, 1970

Pierces disease of Texas grapevines. Hortscience 32(4): 597, 1997

Bacterium discovered to be cause of Pierces disease of grapevines. California and Western States grape grower: 52-54, 1975

Occurrence of Pierces disease of grapevines in Mexico. Phytopathology 69 (8) 919, 1979

Further investigations of the etiology of Pierces disease of grapevines. 1978

Pierces disease of grapevines in central america. Plant Disease Reporter 63(9): 788-792, 1979

Environmental therapy for pierces disease of grapevines. Plant Disease 64(4): 388-390, 1980

Cold therapy of pierces disease of grapevines. Plant Disease Reporter 61(6): 514-518, 1977

Water stress in grapevines with pierces disease. Phytopathology 75(4): 500, 1985

Pierces disease isolation of the causal agent from grapevines. Proceedings of the American Phytopathological Society (4): 138, 1977

Multiplication and translocation of the pierce's disease bacterium in grapevines. Phytopathology 78(12 PART 1): 1541, 1988

Immunological evidence of Pierces Disease in grapevines in Venezuela. Turrialba t 35(3): 243-247, 1985