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Jatindra Nath Samanta Kunal Mandal 《林业研究》2014,25(3):695-700
Guggal, a threatened species that is endemic to western India, is tapped to extract medicinally important oleo–gum–resin(guggul). However, the plant dies after gum exudation. The indigenous tapping techniques used by local people were examined in Gujarat, India to discover the scientific basis behind these techniques: selection of gum inducer, season of tapping, and plant parts to be tapped. First, the presence of Xanthomonas axonopodis pv. commiphorae(Xac) in the gum suspension used for tapping was established. This bacterium induces gum oozing from the tapped plants and later, causes them to die off. The population of Xac in gum was found to decrease with the age of the gum. With that, fresh gum increased the tapping success. Second, local people preferred tapping during the warm season, which we validated by determining that Xac growth was best at 30 °C. Tapping during September(mean temperature 25.7–30.0 °C) clearly favoured growth of the pathogen and yielded maximum guggul. Multiple tapping on a mature tree ensured maximum gum extraction before its death. Finally, application of indigenous technology under natural plant stands by the local people ensured availability of this important raw drug for consumption. Our study established that the age–old traditional methods have a strong scientific basis. However, it is imperative to formulate strategies based on contemporary scientific understanding to protect this natural resource before it becomes extinct. 相似文献
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“专业制作各类手机卡．用制作出来的手机卡接收对方短信，听取双方通话．让对方在手机上没有秘密。”“本公司专业手机卡复制无需原卡，能窃听对方的通信内容．打印手机清单与定位，做到对方手机完全在你的掌控中。”近来，山西太原市公安局110报警服务台接到市民报警称．手机经常收到这样的信息。 相似文献
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