Objective The latex physiological characteristics of six introduced Hevea brasiliensis varieties were analyzed to provide a basis for the enrichment of latex production and flow theory and expanding the planting of H. brasiliensis.
Method With RRIM600 as the control, the number of secondary laticifer and the latex parameters of six introduced H. brasiliensis varieties, such as latex yield, dry rubber content, initial flow rate, content of sucrose, phosphorus, Mg2+ and thiol were measured.
Result The dry rubber yield of Reshi11-107 was 73.9 g per plant, the average number of secondary laticifer was 16.3, the content of sucrose was 8.58 mmol/L, with higher thiol content and initial flow rate and lower plugging index. The dry rubber yield of Reshi11-9 was 14.5 g per plant (the lowest among the 6 varieties), and the sucrose content was 15.32 mmol/L, which was significantly higher than that of the other varieties, while the thiol content and initial flow rate were significantly lower than those of the other varieties. The determined parameters of Reshi11-39 were similar to those of Reshi11-9. The thiol content was 0.64-0.70 mmol/L in Reshi11-1, Reshi11-2 and Reshi11-3, significantly higher than that of the control, while the sucrose content was 4.37-5.17 mmol/L, significantly lower than that of the control. Compared to the control, there was no significant difference in dry rubber content.
Conclusion Reshi11-107 had better latex physiological characteristics and good potential in latex production. The regeneration of latex in Reshi11-9 and Reshi11-39 was insufficient. There were better latex stability, smooth latex flow, high sugar utilization efficiency, and general latex production potential in Reshi11-1, Reshi11-2 and Reshi11-3.
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