由于裂缝快速自愈合过程中乳胶的凝固，使得榕属植物树皮样本的拉伸强度得以恢复。
Restoration of tensile strength in bark samples of Ficus benjamina due to coagulation of latex during fast self-healing of fissures.
机构信息
Plant Biomechanics Group, Botanic Garden, Faculty of Biology, University of Freiburg, Germany.
出版信息
Ann Bot. 2012 Mar;109(4):807-11. doi: 10.1093/aob/mcr307. Epub 2011 Dec 29.
BACKGROUND AND AIMS
The functions of plant latex have been discussed for a long time. Today, many studies support a defence mechanism as being its main function. A role as a self-healing mechanism was never attributed to the coagulation of latex. In this study we quantified the contribution of the coagulation of Ficus benjamina (weeping fig) latex to a restoration of the mechanical properties of the bark after external lesions.
METHODS
Tensile tests of F. benjamina bark were conducted either immediately after injury or at various latency times after injury.
KEY RESULTS
A significant increase in the tensile strength of bark samples until 30 min after injury was found, and this effect could be attributed to the coagulation of plant latex alone. The tensile strength remains nearly constant until several hours or days after injury. Then, very probably due to other mechanisms such as cell growth and cell proliferation, the tensile strength begins to increase slightly again.
CONCLUSIONS
The coagulation of latex seals lesions and serves as a quick and effective pre-step of subsequent, more effective, long-lasting self-healing mechanisms such as cell growth and proliferation. Thus, a fast self-healing effect can be included in the list of functions of plant latex.
背景与目的
植物乳胶的功能已经讨论了很长时间。如今，许多研究支持其主要功能是防御机制。乳胶凝固从未被认为是自我修复机制的作用。在这项研究中，我们量化了榕属（垂榕）乳胶凝固对树皮外部损伤后机械性能恢复的贡献。
方法
对榕属树皮进行拉伸测试，要么在损伤后立即进行，要么在损伤后不同的潜伏期进行。
主要结果
发现损伤后 30 分钟内，树皮样本的拉伸强度显著增加，这一效果可以归因于植物乳胶的凝固作用。拉伸强度在损伤后数小时或数天内几乎保持不变。然后，很可能由于细胞生长和增殖等其他机制，拉伸强度开始再次略有增加。
结论
乳胶的凝固可以密封损伤，并作为随后更有效、更持久的自我修复机制（如细胞生长和增殖）的快速而有效的前置步骤。因此，快速自我修复效果可以被列入植物乳胶的功能列表中。
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