Effect of leaf-section position and physiological stage of the donor plant onLachenalialeaf-cutting performance

Abstract

The distribution of photosynthetates, originating in leaves of different parts of the shoot of Vi tis vinifera L. cv Caber-net Sauvignon at berry set, pea size, veraison and ripeness stages, was investigated. Specific photosynthetic activity of the "CO,-treated leaves gradually decreased during the season. Photosynthetates were hoarded in the leaves at berry set, but were increasingly diverted to the bunches after that. The apical leaves displayed the Itlghes.t.photosynthesis. The leaves opposite and below the bunches accumulated very little photosynthe-tafes, especially from veraison to ripeness. Redistribution of photosynthetates among the basal, middle and apical leaves was generally very restricted at all stages. Multidirectional distribution from the site of application of 14 CO, occurred at berry set stage, while from pea size to ripeness photosynthetates were mainly translocated basipetally. Highest accumulation in the bunches occurred at veraison, while the basal leaves were primarily used to nourish the bunch.

Effect of chipping and scoring techniques on bulb production of Lachenalia cultivars

“…To preserve the identical characteristics of a particular genotype, lachenalia is propagated vegetatively by bulblets (named also offsets or daughter bulbs), bulbils (aerial bulblets) [1], leaf cuttings (bulblets are formed at the base of the cutting) [6,7], or tissue culture [8]. Lachenalia does not produce offsets fast enough for commercial production and so leaf cutting technique is used to efficiently propagate new cultivars [4].…”