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פותח על ידי קלירמאש פתרונות בע"מ -
A new race of sunflower broomrape (Orobanche cumana) with a wider host range due to changes in seed response to strigolactones
Year:
2020
Source of publication :
Weed Science
Authors :
דור, יבגניה
;
.
הרשנהורן, יוסף
;
.
זיאדנה, המאם
;
.
סמירנוב, יבגני
;
.
פלקחין, דינה
;
.
Volume :
68
Co-Authors:

Hailey Larose - PhD Student, Department of Plant Pathology, Physiology and Weed Science, Virginia Tech, Blacksburg, VA, USA.
James H. Westwood - Professor, Department of Plant Pathology, Physiology and Weed Science, Virginia Tech, Blacksburg, VA, USA.

Facilitators :
From page:
134
To page:
142
(
Total pages:
9
)
Abstract:

Broomrapes (Orobanche and Phelipanche species, Orobanchaceae) are obligate root parasites of dicotyledonous plants. This taxonomic group includes seven weedy parasites of agricultural crops that damage vegetables, sunflower (Helianthus annuus L.), and legumes. Processing-tomato (Solanum lycopersicum L.) fields in Israel have been recently found infested with a new broomrape, first identified as nodding broomrape (Orobanche cernua Loefl.) based on its host. However, its morphology resembled the closely related sunflower broomrape (Orobanche cumana Wallr.), an obligate parasite of sunflower. The new race (CUCE) parasitized sunflower, tomato, and tobacco (Nicotiana tabacum L.) in vitro, in a polyethylene bag system and in pots. Its seeds germinated in response to strigolactones (orobanchol, 5-deoxystrigol, 2′-epiorobanchol, and GR24) and dehydrocostus lactone (DCL), whereas O. cumana seeds responded only to DCL and GR24, and O. cernua only to strigolactones. Based on morphological similarities with O. cumana, shared molecular markers with O. cumana, ability to parasitize sunflower and respond to sunflower-germination stimulants, it was concluded that CUCE is a new race of O. cumana, with a host range expanding to Solanaceae crops. While being an important noxious weed of sunflower, this new O. cumana race is currently spreading and posing a threat to processing tomato in Israel. This finding is an alarming indication that broomrapes can shift host range and that similar new races of O. cumana could potentially appear in other countries.

Note:
Related Files :
Branched broomrape
Evolution
Germination stimulant
host resistance
עוד תגיות
תוכן קשור
More details
DOI :
10.1017/wsc.2019.73
Article number:
0
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
47236
Last updated date:
02/03/2022 17:27
Creation date:
05/04/2020 18:08
Scientific Publication
A new race of sunflower broomrape (Orobanche cumana) with a wider host range due to changes in seed response to strigolactones
68

Hailey Larose - PhD Student, Department of Plant Pathology, Physiology and Weed Science, Virginia Tech, Blacksburg, VA, USA.
James H. Westwood - Professor, Department of Plant Pathology, Physiology and Weed Science, Virginia Tech, Blacksburg, VA, USA.

A new race of sunflower broomrape (Orobanche cumana) with a wider host range due to changes in seed response to strigolactones

Broomrapes (Orobanche and Phelipanche species, Orobanchaceae) are obligate root parasites of dicotyledonous plants. This taxonomic group includes seven weedy parasites of agricultural crops that damage vegetables, sunflower (Helianthus annuus L.), and legumes. Processing-tomato (Solanum lycopersicum L.) fields in Israel have been recently found infested with a new broomrape, first identified as nodding broomrape (Orobanche cernua Loefl.) based on its host. However, its morphology resembled the closely related sunflower broomrape (Orobanche cumana Wallr.), an obligate parasite of sunflower. The new race (CUCE) parasitized sunflower, tomato, and tobacco (Nicotiana tabacum L.) in vitro, in a polyethylene bag system and in pots. Its seeds germinated in response to strigolactones (orobanchol, 5-deoxystrigol, 2′-epiorobanchol, and GR24) and dehydrocostus lactone (DCL), whereas O. cumana seeds responded only to DCL and GR24, and O. cernua only to strigolactones. Based on morphological similarities with O. cumana, shared molecular markers with O. cumana, ability to parasitize sunflower and respond to sunflower-germination stimulants, it was concluded that CUCE is a new race of O. cumana, with a host range expanding to Solanaceae crops. While being an important noxious weed of sunflower, this new O. cumana race is currently spreading and posing a threat to processing tomato in Israel. This finding is an alarming indication that broomrapes can shift host range and that similar new races of O. cumana could potentially appear in other countries.

Scientific Publication
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