Flower Initiation in Alaska Pea I. Evidence as to the Role of Auxin

The Dual Role of Auxin in Flowering.

“…Leopold and Guernsey (15,16,17) 3. Time of auxin application experiments indicate that auxin inhibits flowering if applied before translocation of the flowering stimulus from the leaf is complete, and promotes the rate of floral bud development if applied after this time.…”

“…Specimens of the type of plants used in these studies have been filed at the University of California at Los Angeles Herbarium by K. C. Hamner. (23,27 (3,4,12,15,16,17,23). The stages used are illustrated in figure 2, and described in table I.…”

“…Thus the photoperiodic induction of short-day plants is inhibited by applied auxin (2,11,13,14,15,16,17,18,20,24,25,26,27,28,30). This inhibition is a specific one in the sense that appropriately auxin treated plants not only do not flower, but continue to grow vegetatively (11,20).…”

Effects of Cotyledon Excision on the Flowering of Five Varieties of Pisum sativum

“…If the period of low-temperature incubation is included, the number of days to anthesis is also increase(d in vernalized late peas. The early varieties are not vernalizable; in fact LeopoldI and Guernsey (10) reportecl that a low-temperature treatment of Alaska seedlings for 5 days (lelayed flowering of those early peas to a higher node. Similar results were obtained witlh the early variety Massey by Barber (1).…”

“…Despite considerable study, the mechanism(s) by which this bacterium brings about the conversion of normal cells to tumor cells remains in question. It (6,10,12) suggested that an investigation of oxidative enzymes might be particularly interesting. Since previous studies of the enzymes reported on in this paper utilized normal and tumor tissue cultures, it remains to be determined whether these observed changes are truly characteristic of the normal events in converting healthy to crown-gall tissue or whether they are secondary responses reflecting differences in adaptation to culture conditions.…”