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- W2993947868 abstract "The rooting experiments on cuttings of Pinus bungeana were carried out in the nursery of Beijing Shisan-ling Forestry Center in March, June and July of 2000. One-year-old hardwoods and softwoods from seed trees of Pinus bungeana with different ages were used to study the physiological and biochemical basis of rooting. The content of endogenous hormones, including IAA, ABA, GA3 and ZT, and phenol compounds were mea sured using HPLC, and that of total sugar and total nitrogen were analyzed by the methods of hyposulphite ti-tration and nitrogen(Kjeldahl) .The results show that the content of IAA, ZT, GA3 , total sugar, phenol com pounds as well as the ratio of IAA to ABA, IAA to ZT from seed trees of different ages are positively correlated with the rooting rate during the same cutting period. However, only the content of total sugar, ratio of IAA to ABA, and total sugar to total nitrogen is positively correlated with the rooting rate, the other endogenous sub stances from seed trees of same age are contrary to the results mentioned above in the different cutting periods. The authors conclude that the single hormone and phenol compounds have no obvious effect on the rooting of cuttings. The ratios of IAA to ABA and total sugar to total nitrogen are the main factors controlling the rooting of Pinus bungeana cuttings. The larger the ratio, the higher the rooting rate of cuttings." @default.
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- W2993947868 date "2004-01-01" @default.
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- W2993947868 title "physiological and biochemical basis of rooting of pinus bungeana cuttings" @default.
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