Pot experiments were used to screen Five Golden
sweet potato varieties for drought resistance. Two water regimes were applied,
control (maintained by regular watering at or close to field capacity) and
water stressed plants (saturated and allowed to dry gradually to permanent
wilting point). Plant Dry leaf mass, main stem length, internode length, all
decreased in response to the water stress. Leaf water potential reduced
dramatically when water supply was cut off, but there was no statistical
difference across cultivars in both control and water stressed treatments. The
cultivar ST-14 demonstrated more significantly developed drought resistance
characteristics than the other cultivars.
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