死皮橡胶树恢复产胶过程中树皮结构及胶乳生理动态分析

Dynamic Analysis of Bark Structure and Latex Physiology During Promoting the Latex Regeneration of Tapping Panel Dryness(TPD)Trees in Hevea brasiliensis

采用1-MCP促进死皮树恢复产胶,测定死皮树恢复产胶过程中树皮结构及胶乳产量、无机磷、硫醇、蔗糖、黄色体破裂指数等生理参数的变化。结果表明:促进死皮树恢复产胶过程中,死皮树的树皮结构发生明显变化,树皮中黄皮有效乳管列数增加,石细胞和膨大乳管面积减少。从胶乳生理参数的变化来看,胶乳产量呈显著上升趋势,处理前死皮树的胶乳产量为19.89 mL,死皮树恢复产胶后胶乳产量显著增加至最大值,达151.17 mL;硫醇和无机磷含量均呈先下降后上升趋势。处理前死皮树硫醇和无机磷含量分别为0.64 mmol/L和11.26 mmol/L,死皮树恢复产胶后,硫醇和无机磷含量均显著增加至最大值,分别为1.19 mmol/L和14.56 mmol/L;蔗糖含量的变化趋势与胶乳产量的变化趋势一致,也呈显著上升趋势;黄色体破裂指数在死皮树恢复产胶后显著下降至最低值,为13.47%。总体来看,死皮树恢复产胶过程中,硫醇、无机磷和蔗糖含量的变化与胶乳产量的变化呈正相关,而黄色体破裂指数的变化则与产量呈负相关。

1−MCP was used to promote the latex regeneration of tapping panel dryness(TPD)trees in this study.The bark structure and latex physiological parameters,such as latex yield,inorganic phosphorus,thiol,sucrose contents and lutoid bursting index,were measured during TPD tree recovery.The results showed that the bark structures of TPD trees had an obvious change during TPD tree recovery.The number of effective laticifers increased in yellow skin,and the areas of stone cells and swelling laticifers decreased in the barks.From the changes of latex physiological parameters,the latex yield showed a significant increase trend during TPD tree recovery.The latex yield of TPD trees from the control was 19.89 mL,and the yield significantly rose to the maximum of 151.17 mL when the TPD trees recovered the latex flow.The thiol and inorganic phosphorus both firstly decreased and then increased.The contents of thiol and inorganic phosphorus were 0.64 mmol/L and 11.26 mmol/L before treatments,respectively.Their contents both significantly rose to the maximum of 1.19 mmol/L and 14.56 mmol/L when the TPD trees recovered the latex flow,respectively.The sucrose content had an obvious rise trend,which is consistent with the change of latex yield.However,the lutoid bursting index significantly dropped to the minimum of 13.47%when the TPD trees recovered the latex flow.Overall,the changes of the thiol,inorganic phosphorus and sucrose contents were positive correlations with the latex yield,and the change of the lutoid bursting index was negative correlation with the latex yield during TPD tree recovery.