12-12-04 Plants grow upward from a tip of undifferentiated tissue called the shoot apical（顶上的） meristem（分生组织） . As the tip extends, stem cells at the center of the meristem divide and increase in numbers. But the cells on the periphery（外围，边缘...

12-11-05 For decades, bigger is better has been the conventional path to efficiency in industries ranging from transportation to power generation. Food once grown on small family plots now comes overwhelmingly from factory farms. Vessels that carried 2,000 t...

12-09-20 A Washington State University researcher and colleagues make a case in the journal Nature for a new type of agriculture that could restore the beleaguere（包围的） soils of Africa and help the continent feed itself in the coming decades. Their syste...

12-08-28 With the help of beneficial bacteria, plants can slam the door when disease pathogens come knocking, University of Delaware researchers have discovered. A scientific team under the leadership of Harsh Bais, assistant professor of plant and soil scie...

12-08-07 A yucca（丝兰） plant might make your office desk look nice, but with a new technology developed at Disney Research, Pittsburgh, that little shrub could possibly control your computer. And the jade plant nearby? Put your hand close to it and your iP...

12-08-06 Plants produce toxins to defend themselves against potential enemies, from herbivorous（食草的） pests to diseases. Oilseed rape plants produce glucosinolates to serve this purpose. However, due to the content of glucosinolates, farmers can only use...

12-07-20 A new study finds elevated levels of caffeine（咖啡因） at several sites in Pacific Ocean waters off the coast of Oregon -- though not necessarily where researchers expected. This study is the first to look at caffeine pollution off the Oregon coast...

12-07-09 On a recent expedition to the inhospitable（荒凉的） North Atlantic Ocean, scientists at the University of Washington and collaborators studying the annual growth of tiny plants were stumped to discover that the plankton（浮游生物） had started grow...

12-07-05 University of Adelaide researchers have discovered that recent climate change is causing leaves of some Australian plants to narrow in size. The study, which is the first of its kind in the world, highlights that plant species are already responding...

12-06-28 When it came to eating, an upright, 2 million-year-old African hominid had a diet unlike virtually all other known human ancestors, says a study led by the Max Planck Institute of Evolutionary Anthropology in Leipzig, Germany and involving the Unive...