| 2007年03月08日 Nature中英文摘要 | 点击： 作者：51protocol收集 来源： 时间： 2007-03-13 本站论坛
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March 08, 2007
表皮组织被确定是决定植物根生长的关键
植物根由三个组织类型形成—表皮组织、表皮下组织和内层细胞组织。其中的一个类型是决定植物最终大小的关键，但到底是哪一种，一个多世纪以来一直有争议。现在，矮拟南芥植物中油菜素内酯(brassinosteroid)生物合成基因的定向表达实验为这个问题提供了答案：是表皮组织既促进根的生长又限制根的生长。油菜素内酯是在化学性质上与“可的松”（cortisol）有关的植物激素，对植物生长有广谱效应。
Contents
Editorials
No more hot air p109
European heads of state gathered in Brussels today must show they are serious about climate change.
doi:10.1038/446109a
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Tackling tuberculosis p109
There is a dangerous gulf between the global programmes to fight AIDS and TB.
doi:10.1038/446109b
Full Text | PDF (121K)
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The ends of the Earth p110
International Polar Year 2007 can leave an imprint.
doi:10.1038/446110a
Full Text | PDF (71K)
See also: Editor's summary
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Top of pageResearch Highlights
Research highlights p112
doi:10.1038/446112a
Full Text | PDF (333K)
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Top of pageNews
Western states launch carbon scheme p114
Governors team up for cap-and-trade programme.
Emma Marris
doi:10.1038/446114a
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Scriptural violence can foster aggression p114
Elements of religious texts seem to inspire bad behaviour.
Heidi Ledford
doi:10.1038/446114b
Full Text | PDF (402K)
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Our Solar System last week p116
Celestial bodies caught on camera
Katharine Sanderson and Geoff Brumfiel
doi:10.1038/446116a
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Biobank provides leads for selecting guide dogs p119
Genetics highlights the pick of the pups.
Ichiko Fuyuno
doi:10.1038/446119a
Full Text | PDF (181K)
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Sidelines p119
doi:10.1038/446119b
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Superconductivity two decades on p120
What happened after the physics Woodstock?
Geoff Brumfiel
doi:10.1038/446120a
Full Text | PDF (106K)
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Design chosen for nuclear warheads p121
Lawrence Livermore's proposal wins support.
Lucy Odling-Smee
doi:10.1038/446121a
Full Text | PDF (77K)
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News in brief p122
doi:10.1038/446122a
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Top of pageBusiness
A place in the sun p124
In the Tuscan countryside just outside Siena, a historic laboratory is helping Novartis in its bid to become the world's premier vaccine company. Alison Abbott reports.
doi:10.1038/446124a
Full Text | PDF (305K)
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In brief p125
doi:10.1038/446125a
Full Text | PDF (167K)
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Market watch p125
Colin Macilwain
doi:10.1038/446125b
Full Text | PDF (167K)
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Top of pageNews Features
Polar Research: Buried treasure p126 Free access
Air bubbles trapped in the Antarctic ice sheet could yield precious information about Earth's climate more than a million years ago. But to access this record, scientists first have to climb one of the coldest peaks on Earth. Nicola Jones reports.
doi:10.1038/446126a
Full Text | PDF (926K)
See also: Editor's summary
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Polar Research: Polar year projects p127
doi:10.1038/446127a
Full Text | PDF (1,433K)
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Polar research: School of rock p129
The rocks of Antarctica are obscured literally, and sometimes scientifically, by its ice. But drilling efforts are now showing what we can learn from the hard stuff. Alexandra Witze reports.
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