منابع مشابه
Plant development: Attractive ovules
How does a pollen tube seek out and find an ovule, its ultimate goal inside the female reproductive organs of a flower? And once an ovule has been found and fertilized, how are other pollen tubes prevented from attempting the same task? These interesting questions have been posed and considered for over 100 years, and direct answers will soon be available. A structural guidance mechanism by its...
متن کاملBacteria within ovules and seeds.
Surface-sterilized ovules and seeds of 27 species of plants were cultured in the water of syneresis of a nutrient medium low in agar content. Bacteria were obtained from 30% of the ovules, 15% of the seeds of herbaceous plants, 16% of the seeds of woody plants, 5.4% of the overwintered noncereal seeds, and 13.5% of overwintered cereal seeds. In no instance did every ovule or seed of a plant spe...
متن کاملAttractive Design Approaches for a Compact Stellarator Power Plant
Mechanical and Aerospace Department and Center for Energy Research, 458 EBU-II, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 90093-0438, USA [email protected] University of Wisconsin, Fusion Technology Institute, Madison, WI 53706, USA, [email protected] Consultant, Fliederweg 3, D 76351 Linkenheim-Hochstetten, Germany, [email protected] Center for Energy Resear...
متن کاملBacillus-related Spore Formers: Attractive Agents for Plant Growth Promotion
Aerobic spore-forming bacteria, such as Bacillus spp., Paenibacillus spp., and Brevibacillus spp., are one of the major soil bacteria (1, 2, 15). This finding is based on the culture-dependent methods. The culture-independent methods have also revealed that Bacillus spp. constitute a majority of the bacteria in a Dutch soil (6) and a soil contaminated with chlorinated compounds in Taiwan (3). I...
متن کاملEngineering challenges in designing an attractive compact stellarator power plant
This paper summarizes the key engineering outcomes from the ARIES-CS study. The most promising power plant concept is escribed. The engineering design of the fusion power-core components (including the blanket and divertor) and the coil structural esign are briefly described along with a summary of the key results from the detailed neutronics, stress, thermal-hydraulic and ower cycle analyses p...
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ژورنال
عنوان ژورنال: Current Biology
سال: 1997
ISSN: 0960-9822
DOI: 10.1016/s0960-9822(06)00037-6