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朋娜和纽荷尔脐橙在脐黄初发期，初生果内源ｉＰＡｓ浓度出现低谷，进入脐黄主要发生期后又上升，但纽荷尔上升较朋娜慢；朋娜次生果内源ｉＰＡｓ浓度明显高于初生果，不出现低谷；纽荷尔次生果内源ｉＰＡｓ浓度随初生果出现低谷，但其浓度仅在脐黄后期高于初生果。朋娜和纽荷尔初生果和次生果内源ＺＲｓ浓度一般在ｉＰＡｓ浓度的１／１０以下，其浓度变化规律与ｉＰＡｓ基本相同。
PNA and Newhall navel orange in the umbilical yellow initial stage, primary fruit endogenous iPAs concentration trough into the umbilical yellow after the main period of rise, but the Newhall rose more than Na Na slow; peer fruit secondary endogenous iPAs concentration Significantly higher than the primary fruit, does not appear low; Newhall secondary fruiting endogenous iPAs concentration trough with primary fruit, but its concentration is higher than the navel yellow only in late fruit. The concentrations of endogenous ZRs in primary and secondary fruiting bodies of Pona and Newhall are generally below 1/10 of that of iPAs, and their concentration changes are basically the same as that of iPAs.