Secondary metabolites from plants have long been considered as “waste products” or “storage materials”, however it has become clear in recent years that they have important functions in plant survival strategy. Such a function may be higly prominent in desert plants where competition for survival is very intense. In this paper, search for the allelopathic activity of desert plants in Inner Mongolia Autonomous Region was conducted for the purpose of utilising the most efficient desert plants.
Concequently, the leaves, fruits and other parts of 22 plants growing in the desert area of Inner Mongolian Autonomous Region were examined by the “Sandwich Method” which is widely used to assay allelopathy of plant parts. The results of the test are as follows: Hippophae rhamnoides (Sea Buckthorn) 96%, Artemisia sphaerocephala （Round Wormwood） 94%, Salsola collina (Common Russianthistle) 92%, Artemisia annua (Sweet annie) 87%, Platycodon grandiflorus (Ballon Flower) 87%, Salix psammophila (Desert Willow) 85%, and Agriophyllum squarrosum (Sand Rice) 83% (in order from strong to weak). Strong activity was observed in most of the species. As a result of the bioassay by the dishpack method, which tests the allelopathy of plant volatile substances, strong activity was observed in the order of Artemisia annua 89%, Sabina vulgaris (Smell Kashiwa) 77%, Artemisia sphaerocephala 54%, Artemisia ordosia (strong to weak) 52%.
The strongest Sea Buckthorn fruit inhibited the growth of the recipient plant lettuce by 96% at 10 mg-dry weight/10 mL agar. Sarcosine and asparagine were detected as candidates for potential allelochemical as a result of GC-MS analysis of water extract of Sea Buckthorn fruit.
In the test of volatile substances of Sweet annie, the growth of the recipient plant lettuce was in hibited and 1,8-cineole was detected as the major compound by GC-MS analysis.
A. D. Simukov is a researcher who studied about fauna, flora, social structures of nomadic society and so on throughout Mongolia during 1920’s-30’s. We translated one of his papers regarding nomadic life in Övörkhangai prefecture. The paper discussed about locations where herders used as the seasonal camp and grazing site. We can find that livestock groups composed of each species were distributed to different locations by the Lamyn-Gegeen monastery.
This article discusses about types of irrigated datepalm cropping in Saharan oases by modes of water supply and modes of datepalm growing. Then the article mentions about processing and exportation of dates for understanding current situation of irrigated datepalm cropping in the Sahara.
Wild species tomatoes are distributed in the Pacific coast and the Galapagos Islands in the Andes mountains of South America, and many of the native areas create their own diverse ecosystems in arid and semi-arid areas. Although these are very important traits in the use of tomatoes, they are a valuable genetic resource for the improvement of varieties, but their traits and physiological characteristics are hardly known. On the other hand, the species itself is endangered by the global environmental change and human development, and the disappearance of the native land itself is feared. In addition, international law is applied, and the introduction and the use from the wild land are restricted. In this paper, we detail the characteristics of species of wild species tomatoes and outline the conservation and use rules of genetic resources.
Edible insects attract high attention as new food source. In arid-area like Namibia, many types of insects relating with its regional ecological environments were eaten and Mopane worm is typical one. It is generally considered that food source obtained in arid and semi-arid areas were scarce, but represented by the case study in this paper showing the diverse usage of edible insects in Namibia, the resource use in the area have variety.