. Auxins and plant growth. Auxin; Plant growth promoting substances. A BCD Fig. 50. The role of ovules in growth of strawberry fruits, and their replacement with auxin. (A) normal intact fruit; (B) removal of achenes from the sides of the fruit results in localized giowth; (C) removal of all achenes prevents fruit growth; (D) removal of all achenes and application of auxin (100 /3-naphthoxyacetic acid) permits normal growth again (redrawn from Nitsch, 1950). Stages the major source of auxin is the young developing embryo. That developing embryos are a particularly rich source of auxin h
. Auxins and plant growth. Auxin; Plant growth promoting substances. A BCD Fig. 50. The role of ovules in growth of strawberry fruits, and their replacement with auxin. (A) normal intact fruit; (B) removal of achenes from the sides of the fruit results in localized giowth; (C) removal of all achenes prevents fruit growth; (D) removal of all achenes and application of auxin (100 /3-naphthoxyacetic acid) permits normal growth again (redrawn from Nitsch, 1950). Stages the major source of auxin is the young developing embryo. That developing embryos are a particularly rich source of auxin has been dramatically shown in several instances (Wittwer, 1943; Luckwill, 1948; Mitchell et al, 1951) and the great role that these auxin sources jilay in development of the fruit has been abinidantly demonstrated by Nitsch (1950) working with strawberry fruits. His experiments have indicated that the greatest part of growth of the fruit is brought about by the auxin produced in the developing achene. It can be seen in figure 50 that removal of some of the ovules or young achenes caused localized fruit growth around the remaining ones {B). Complete re- moval of the ovules deprived the fruit of the hormone needed for growth (C), and supplying auxin replaced the function of the achenes in causing fruit growth (D).. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Leopold, A. Carl (Aldo Carl), 1919-. Berkeley, University of California Press
Size: 1813px × 1378px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookpublisherberkeleyuniversityofcaliforniapre
