Abstract
SummaryCarbohydrates have been considered important in the productivity of lychee (Litchi chinensis Sonn.), but it is not known which plant parts best reflect the reserves available for new growth. Six year old lychee trees (cvs Tai So, Bengal, Brewster, Souey Tung, Haak Yip, Kwai May Pink, Salathiel and Wai Chee) growing in subtropical Australia (lat. 27°S) were uprooted and dissected into nine parts just after panicle emergence in July and August for determination of starch concentration. The pools of starch in a flowering and a vegetative tree (eight year old Kwai May Pink lychee), the effect of cincturing on starch reserves of cv. Bengal, and seasonal changes in starch concentration in four orchards (cvs Tai So at two sites, Bengal and Kwai May Pink) over a single year were also examined. In the destructive harvests of the lychee cultivars, about half of the tree’s starch reserves were found in the small and medium branches 1-5 cm in diameter. This was due to their high concentration of starch (8.1 to...
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