Resistance to Striga hermonthica in a maize inbred line derived from Zea diploperennis.

The New Phytologist
Idris O AmusanGebisa Ejeta

Abstract

Breeding for resistance to Striga in maize (Zea mays), with paucity of donor source and known mechanisms of resistance, has been challenging. Here, post-attachment development of S. hermonthica was monitored on two maize inbreds selected for field resistance and susceptibility reactions to Striga at the International Institute of Tropical Agriculture. Haustorial invasion of the parasite into roots of these inbreds was examined histologically. Morphological differences were observed between roots of the susceptible and the resistant inbreds. The resistant maize had fewer Striga attachments, delayed parasitic development and higher mortality of attached parasites compared with the susceptible inbred. Striga on the susceptible inbred usually penetrated the xylem and showed substantial internal haustorial development. Haustorial ingress on the resistant inbred was often stopped at the endodermis. Parasites able to reach resistant host xylem vessels showed diminished haustorial development relative to those invading susceptible roots. These results suggest that the resistant inbred expresses a developmental barrier and incompatible response against Striga parasitism.

References

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Jan 5, 2006·The New Phytologist·A L GurneyJ D Scholes
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Citations

Oct 31, 2012·Journal of Biosciences·B M Prasanna
Mar 21, 2009·Pest Management Science·Sarah J Hearne
Jun 11, 2009·Plant Signaling & Behavior·Patrick J Rich, Gebisa Ejeta
Jun 1, 2016·Frontiers in Plant Science·Hiroaki SamejimaYukihiro Sugimoto
Jun 22, 2019·Annual Review of Phytopathology·Christopher R ClarkeJames H Westwood
Nov 30, 2019·Frontiers in Plant Science·Melaku Gedil, Abebe Menkir
Apr 2, 2021·Plant Physiology·Muhammad JamilSalim Al-Babili
Jul 10, 2021·Plant Breeding = Zeitschrift Für Pflanzenzüchtung·Abdoul-Madjidou YacoubouPaterne Agre
Jul 10, 2021·International Journal of Genomics·Arthur PfunyeEdmore Gasura

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