New Zealand Journal of Botany abstracts

---

DIURNAL AND PLASTOCHRONAL CHANGES IN THE SHOOT APEX OF TRADESCANTIA FLVMIN- ENSIS VELL

M. Patricia Denne

Plant Physiology Division, Department of Scientific and Industrial Research, Palmerston North

Abstract In all regions of the apex, the mitotic index reached a maximum during the day. The mitotic index was significantly higher in the flanks of the apex than in the summit, and higher in summit than in rib or axillary regions. Mitotic index of the flank producing the next primordium declined during the plastochron, while that of the opposite side of the apex increased. The area of the median longitudinal section of the apex was more than doubled during the plastochron, this increase being mainly due to increase in cell number. The size and cell number of the summit region remained constant during the plastochron.

N.Z.Jl Bot.4: 444-54.
(Received for publication 17 December 1965)

PDF file of entire paper: medium quality (411K); (scanned from paper original: notes about this process)

---

This year's abstracts | Journal home page | All abstracts | Publishing home page