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פותח על ידי קלירמאש פתרונות בע"מ -
Interaction between Orobanche crenata and its host legumes: Unsuccessful haustorial penetration and necrosis of the developing parasite
Year:
2005
Source of publication :
Annals of Botany
Authors :
יואל, דניאל
;
.
Volume :
95
Co-Authors:
Pérez-De-Luque, A., CSIC, Instituto de Agricultura Sostenible, Apdo. 4084, 14080 Córdoba, Spain
Rubiales, D., CSIC, Instituto de Agricultura Sostenible, Apdo. 4084, 14080 Córdoba, Spain
Cubero, J.I., ETSIAM-UCO, Dep. Genética, Apdo. 3048, 14080 Córdoba, Spain
Press, M.C., Department of Animal and Plant Sciences, University of Sheffield, Sheffield S10 2NT, United Kingdom
Scholes, J., Department of Animal and Plant Sciences, University of Sheffield, Sheffield S10 2NT, United Kingdom
Yoneyama, K., Center for Research on Wild Plants, Utsunomiya University, Utsunomiya, 321-8505, Japan
Takeuchi, Y., Center for Research on Wild Plants, Utsunomiya University, Utsunomiya, 321-8505, Japan
Plakhine, D., Newe-Ya'ar Research Center, ARO, PO Box 1021, Ramat-Yishay 30095, Israel
Joel, D.M., Newe-Ya'ar Research Center, ARO, PO Box 1021, Ramat-Yishay 30095, Israel
Facilitators :
From page:
935
To page:
942
(
Total pages:
8
)
Abstract:
• Background and Aims: Orobanche species represent major constraints to crop production in many parts of the world as they reduce yield and alter root/shoot allometry. Although much is known about the histology and effect of Orobanche spp. on susceptible hosts, less is known about the basis of host resistance to these parasites. In this work, histological aspects related to the resistance of some legumes to Orobanche crenata have been investigated in order to determine which types of resistance responses are involved in the unsuccessful penetration of O. crenata. • Methods: Samples of resistance reactions against O. crenata on different genotypes of resistant legumes were collected. The samples were fixed, sectioned and stained using different procedures. Sections were observed using a transmission light microscope and by epi-fluorescence. • Key Results: Lignification of endodermal and pericycle host cells seems to prevent parasite intrusion into the root vascular cylinder at early infection stages. But in other cases, established tubercles became necrotic and died. Contrary to some previous studies, it was found that darkening at the infection site in these latter cases does not correspond to death of host tissues, but to the secretion of substances that fill the apoplast in the host-parasite interface and in much of the infected host tissues. The secretions block neighbouring host vessels. This may interfere with the nutrient flux between host and parasite, and may lead to necrosis and death of the developing parasite. • Conclusions: The unsuccessful penetration of O. crenata seedlings into legume roots cannot be attributed to cell death in the host. It seems to be associated with lignification of host endodermis and pericycle cells at the penetration site. The accumulation of secretions at the infection site, may lead to the activation of xylem occlusion, another defence mechanism, which may cause further necrosis of established tubercles. © The Author 2005. Published by Oxford University Press on behalf of the Annals of Botany Company. All rights reserved.
Note:
Related Files :
Cicer arietinum
Fabaceae
necrosis
Orobanche
Parasitology
Pisum sativum
Vicia faba
עוד תגיות
תוכן קשור
More details
DOI :
10.1093/aob/mci105
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
26327
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:21
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Scientific Publication
Interaction between Orobanche crenata and its host legumes: Unsuccessful haustorial penetration and necrosis of the developing parasite
95
Pérez-De-Luque, A., CSIC, Instituto de Agricultura Sostenible, Apdo. 4084, 14080 Córdoba, Spain
Rubiales, D., CSIC, Instituto de Agricultura Sostenible, Apdo. 4084, 14080 Córdoba, Spain
Cubero, J.I., ETSIAM-UCO, Dep. Genética, Apdo. 3048, 14080 Córdoba, Spain
Press, M.C., Department of Animal and Plant Sciences, University of Sheffield, Sheffield S10 2NT, United Kingdom
Scholes, J., Department of Animal and Plant Sciences, University of Sheffield, Sheffield S10 2NT, United Kingdom
Yoneyama, K., Center for Research on Wild Plants, Utsunomiya University, Utsunomiya, 321-8505, Japan
Takeuchi, Y., Center for Research on Wild Plants, Utsunomiya University, Utsunomiya, 321-8505, Japan
Plakhine, D., Newe-Ya'ar Research Center, ARO, PO Box 1021, Ramat-Yishay 30095, Israel
Joel, D.M., Newe-Ya'ar Research Center, ARO, PO Box 1021, Ramat-Yishay 30095, Israel
Interaction between Orobanche crenata and its host legumes: Unsuccessful haustorial penetration and necrosis of the developing parasite
• Background and Aims: Orobanche species represent major constraints to crop production in many parts of the world as they reduce yield and alter root/shoot allometry. Although much is known about the histology and effect of Orobanche spp. on susceptible hosts, less is known about the basis of host resistance to these parasites. In this work, histological aspects related to the resistance of some legumes to Orobanche crenata have been investigated in order to determine which types of resistance responses are involved in the unsuccessful penetration of O. crenata. • Methods: Samples of resistance reactions against O. crenata on different genotypes of resistant legumes were collected. The samples were fixed, sectioned and stained using different procedures. Sections were observed using a transmission light microscope and by epi-fluorescence. • Key Results: Lignification of endodermal and pericycle host cells seems to prevent parasite intrusion into the root vascular cylinder at early infection stages. But in other cases, established tubercles became necrotic and died. Contrary to some previous studies, it was found that darkening at the infection site in these latter cases does not correspond to death of host tissues, but to the secretion of substances that fill the apoplast in the host-parasite interface and in much of the infected host tissues. The secretions block neighbouring host vessels. This may interfere with the nutrient flux between host and parasite, and may lead to necrosis and death of the developing parasite. • Conclusions: The unsuccessful penetration of O. crenata seedlings into legume roots cannot be attributed to cell death in the host. It seems to be associated with lignification of host endodermis and pericycle cells at the penetration site. The accumulation of secretions at the infection site, may lead to the activation of xylem occlusion, another defence mechanism, which may cause further necrosis of established tubercles. © The Author 2005. Published by Oxford University Press on behalf of the Annals of Botany Company. All rights reserved.
Scientific Publication
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