Resistance to broomrape (Orobanche spp.) in sunflower (Helianthus annuus L.) is temperature dependent | Zendy

Hanan Eizenberg | Zendy; Dina Plakhine | Zendy; J. Hershenhorn | Zendy; Y. Kleifeld | Zendy; Baruch Rubin | Zendy

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Resistance to broomrape (Orobanche spp.) in sunflower (Helianthus annuus L.) is temperature dependent

Author(s) -

Hanan Eizenberg,

Dina Plakhine,

J. Hershenhorn,

Y. Kleifeld,

Baruch Rubin

Publication year - 2003

Publication title -

journal of experimental botany

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.616

H-Index - 242

eISSN - 1460-2431

pISSN - 0022-0957

DOI - 10.1093/jxb/erg129

Subject(s) - orobanche , helianthus annuus , sunflower , parasitic plant , biology , orobanchaceae , botany , horticulture , agronomy , host (biology) , ecology

The effects of various temperature regimes in the range 29-17/21-9 degrees C day/night on each stage of the parasitism process of Orobanche cumana and O. aegyptiaca on sunflower were studied under controlled conditions in polyethylene bags. The response of the resistant sunflower variety 'Ambar' was expressed as the degeneration of the parasite tissues after its establishment in the plant roots, and this stage was found to be temperature dependent. The degeneration rate of Orobanche tubercles in the resistant sunflower variety was also found to be temperature dependent and was about five times as great as that in the sensitive variety in the highest temperature regime tested of 29/21 degrees C day/night. The ability to reject the parasite by causing its degeneration and death is the main factor that determines the resistance. As the temperature rises, more tubercles degenerate and die, that is the sunflower plant expresses higher levels of resistance.

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