NDLI: Infection of citrus pollen grains by Colletotrichum acutatum

Content Provider	Springer Nature Link
Author	Marques, João Paulo Rodrigues Amorim, Lilian Spósito, Marcel Bellato Marin, Denis Appezzato da Glória, Beatriz
Copyright Year	2013
Abstract	Postbloom fruit drop (PFD), an important disease caused by Colletotrichum spp., affects citrus yields in Brazil. PFD is characterised by the presence of necrotic lesions on the petals and stigmas of citrus flowers and by the subsequent abscission of young fruit. PFD epidemics have high disease progress rates, which is unusual for a pathogen that produces acervuli and is dispersed by rain. It is possible that other dispersal agents, such as insects and pollen, are involved in the spread of this disease. The objective of this work was to test whether citrus pollen grains can be colonised by Colletotrichum acutatum. Studies using light and electron microscopy showed that the pollen of Citrus sinensis can be infected by C. acutatum. This pathogen can penetrate and colonise citrus pollen grains 24 h after inoculation with the pathogen. The germ tube of conidia either penetrates the pollen sporodermis directly or passes through pollen germ pores. A single hypha can colonise more than one pollen grain. On the surface of the stigma, conidium formation can be observed. This study shows that Citrus sinensis pollen may, in fact, play a role in the spread of C. acutatum in citrus orchards.
Starting Page	35
Ending Page	40
Page Count	6
File Format	PDF
ISSN	09291873
Journal	European Journal of Plant Pathology
Volume Number	136
Issue Number	1
e-ISSN	15738469
Language	English
Publisher	Springer Netherlands
Publisher Date	2013-03-07
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Citrus sinensis Fungal disease Postbloom fruit drop Plant Pathology Plant Sciences Ecology Agriculture Life Sciences
Content Type	Text
Resource Type	Article
Subject	Plant Science Horticulture Agronomy and Crop Science

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