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THE ACTIVITY OF SOME SYNTHETIC CYTOKININS IN BREAKING THERMODORMANCY OF LETTUCE (LACTUCA SATIVA L.)
Author(s) -
Van Genderen H. H.,
Lemmens G. M. H.
Publication year - 1978
Publication title -
acta botanica neerlandica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.871
H-Index - 87
eISSN - 1438-8677
pISSN - 0044-5983
DOI - 10.1111/j.1438-8677.1978.tb00269.x
Subject(s) - lactuca , kinetin , cytokinin , callus , germination , chemistry , biological activity , botany , asteraceae , purine , biology , enzyme , explant culture , biochemistry , in vitro , auxin , gene
SUMMARY The following synthetic cytokinins: 6‐furfurylaminopurine (kinetin), 6‐(3‐methyl‐2‐butenylamino)purine (isopentenyladenine) and their 1‐deaza‐,8‐aza‐1‐deaza‐, 3‐deaza‐, and 8‐aza‐3‐deaza‐analogs were investigated for biological activity in breaking thermodormancy in lettuce seed ( Lactuca sativa L. cv. meikoningin, Asteraceae). In dose‐response experiments 6‐(3‐methyl‐2‐butenylamino)‐1‐deazapurine appeared to be the most active substance tested. This chemical stimulated germination at lower concentrations and to a greater extent than the others. All the isopentenyl derivates were more active than the corresponding furfuryl analogs. In general, the results are similar to those obtained with a callus growth test, which supports the view that the results definitely indicate cytokinin activity.