منابع مشابه
The phylogeny of yuccas.
The genus Yucca is widely recognized for its pollination mutualism with yucca moths. Analysis of diversification in this interaction has been hampered by the lack of a robust phylogeny for the genus. Here we attempt the first extensive nuclear DNA based assessment of the phylogenetic relationships of Yucca. We used AFLP markers to recover the phylogeny of 87 samples representing 38 Yucca taxa. ...
متن کاملReassessing the role of YUCCAs in auxin biosynthesis.
It is remarkable that although auxin was the first growth-promoting plant hormone to be discovered, and although more researchers work on this hormone than on any other, we cannot be definitive about the pathways of auxin synthesis in plants. In 2001, there appeared to be a dramatic development in this field, with the announcement of a new gene, and a new intermediate, purportedly from the tryp...
متن کاملSoil Degradation under Sugarcane Cultivation in Northern Kwazulu-natal
In many crop producing areas of the world there are reports of yield decline and loss of productive potential in soils. Little is known about the long term effects of sugarcane monocropping on changes in physical, chemical and biological properties of soils. The aim of this study was to quantify the physical and chemical condition of soils under sugarcane production in northern Kwazulu-Natal, a...
متن کاملCultivation of Neisseria gonorrhoeae under low-oxygen conditions.
Sixteen Neisseria gonorrhoeae strains were examined for their abilities to grow under reduced oxygen tension. Low oxygen tensions were developed by evacuation-replacement procedures in which anaerobes and oxidation-reduction indicators were used as controls. All strains survived 96 h in a medium reduced to below -125 mV without visible growth. Detectable growth occurred at 0.05% oxygen, and 33%...
متن کاملAnalysis of Microbial Diversity in Soil under Ginger Cultivation
Ginger is a perennial monocotyledonous herb, which can be used as both a vegetable and a medicinal plant. However, it is susceptible to various plant pathogens. Microbial diversity in soil is related closely to the health and productivity of plant crops including ginger. In the current study, we compared microbial diversity from soil samples under ginger cultivation (disease incidence of >50% [...
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ژورنال
عنوان ژورنال: Nature
سال: 1880
ISSN: 0028-0836,1476-4687
DOI: 10.1038/022606d0