PJB-1984-19
Effect of growth regulators on cotyledonary architecture of brassica juncea L.
N.V. RAO AND J.A. INAMDAR
Abstract
The major venation pattern in control as well as treated cotyledons of brassica juncea conforms to camptodromous type with festooned brochidodromous secondaries. The margibal ultimate venation is looped . the size of the areoles does not vary significantly . the cotyledonary area, size and number of trachields vary in different treatments ,. In MOR 25
ppm treated cotyledons, the density
of trachields is maximum. The parenchymatous bundle sheath cells differentiated into trachieldal nodules are observed in GA 25 ppm.
Miniature vessel elements without prominent secondary side wall thickening are observed in COL 25 ppm. The miniature vessel elements so far unreported at the vein endings are observed in DW , GA 50 ppm, MOR 25 ppm, 2,4-D 25 , 50 ppm, MH
25 ppm and COL 25 ppm. The occurrence of miniature vessel elements at the vein endings is an unusual feature. It is eident that MCR,
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