TITLE:
Anatomical Studies on Compatibility and Incompatibility of Some Solanaceous Plant Species to Field Dodder (Cuscuta campestris Yuncker)
AUTHORS:
Awad F. Farah, Samia M. Ibrahim
KEYWORDS:
Compatible or Incompatible Hosts, Field Dodder, Haustorium, Searching Hyphae, Solanaceous Plant Species
JOURNAL NAME:
American Journal of Plant Sciences,
Vol.5 No.15,
July
18,
2014
ABSTRACT:
Four solanaceous
plant species, namely hot pepper (Capsicum frutescensL.), potato (Solanum
tuberosumL.), tobacco (Nicotiana tabacumL.) and tomato (Lycopersicon
esculentumMiller) were anatomically screened for compatibility/incompatibility
to field dodder (Cuscuta campestrisYuncker, Cuscutaceae). The
development of field dodder haustorium within stem tissues of the studied
solanaceous plants was found to depend on the latter’s response to the former’s
penetration. In hot pepper and tobacco, which showed a positive response, the
haustorium was well developed and its searching hyphae established connections
with their vascular tissues. However, potato and tomato showed a negative
response and acquired different defense mechanisms against the parasitism of
field dodder. In both of them, the field dodder haustorium and/or its searching
hyphae exhibited distorted appearance and failed to establish connection with
their vascular tissues. Thus, the tested solanaceous plant species could be
classified as either compatible (hot pepper and tobacco) or incompatible
(potato and tomato) hosts to field dodder.