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EXPERIMENTAL INITIATION OF HAUSTORIA IN AGALINIS PURPUREA (SCROPHULARIACEAE)
Author(s) -
Riopel James L.,
Musselman Lytton J.
Publication year - 1979
Publication title -
american journal of botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.218
H-Index - 151
eISSN - 1537-2197
pISSN - 0002-9122
DOI - 10.1002/j.1537-2197.1979.tb06259.x
Subject(s) - haustorium , biology , scrophulariaceae , exudate , botany , host (biology) , ecology
The initiation and early developmental stages of the haustorium were studied in Agalinis purpurea (Scrophulariaceae). Plants were grown in a 0.9% agar inorganic medium with a 0.5% sucrose supplement. Root exudate collected from Lespedeza sericea induced the initiation of haustoria, with earliest stages evident in 6‐12 hr. A 30‐min exposure to exudate produced an increased frequency of haustoria and a 24‐hr exposure yielded haustorial frequencies equal to the number that were initiated on control plants continuously exposed to root exudate for the 5‐day growth period. The early cytological features of haustorial development are described and the possible significance of haustorial initiation in host recognition is discussed.