The chromosomes in root tip cells of Trifoliate orange(Poncirus trifoliata Raf. )and Ichang papeda(Citrus ichangensis Swingle)were observed by enzymic maceration technique.
用酶解法观察了枳和宜昌橙根尖细胞的染色体。
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By extending the planting hole and improving the soil, soil is humificated from root around to all orchard and then these are the base for increasing the orange quality and tree vigor.
A tropical American vine (Ipomoea batatas) having rose-violet or pale pink, funnel-shaped flowers, and cultivated for its fleshy, tuberous orange-colored root.