Etiology of sprouting in purple yam (Dioscorea alata L.) tubers

Abstract

The etiology of sprouts was determined so that the technology of increasing the sprouting ability of propagating materials from purple yam (Dioscorea alata L.) tubers can be established. Faster sprouting occurred in tubers planted as soon as they matured and where moisture content of the tubers was reduced to 60%. Big whole tubers (2-3 kg) sprouted at the same time as small ones (0.15-0.20 kg). However, the smallest seedsett size that could result in acceptable percentage sprouting (43%) was 10 g. Seedsett size that could result in 100% sprouting was 50 g. The seedsetts taken from the proal end always sprouted ahead of those taken from the distal end. Sprouting always emerged at the upper one-third of the seedsetts, regardless of the portion of the tuber from which they were cut. More of the transversely cut 2.5-5 g seedsetts sprouted than the longitudinally cut ones due to more cells that are mature in the former. A 1-kg tuber can be divided into as much as 112 seedsetts of 8-10 g each, all of which have the capability to sprout.

Source or Periodical Title

Philippine Agricultural Scientist

ISSN

317454

Page

350-356

Document Type

Article

Subject

Dioscorea alata, Seedsetts, Sprouting, Yam

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