News tagged with plant embryo
Seed size is controlled by maternally produced small RNAs: research
Seed size is controlled by small RNA molecules inherited from a plant's mother, a discovery from scientists at The University of Texas at Austin that has implications for agriculture and understanding plant ...
Apr 11, 2012 |
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Short-lived seed of alpine plants
Scientists from the Millennium Seed Bank Partnership have found that the seeds of alpine plants are shorter lived than their lowland relatives. This will have implications for seed conservation strategies ...
Sep 21, 2011 |
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Oldest pregnant lizard fossil discovered
(PhysOrg.com) -- A new paper published in Naturwissenschaft reveals a fossil from 120 million years ago that proves that some lizards were not laying eggs but rather giving birth to live y ...
Other Sciences / Archaeology & Fossils
Jul 22, 2011 |
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Parental conflict in plants: Maternal factors silence paternal genes
In flowering plants, the beginning of embryogenesis is almost exclusively governed by maternal gene activity. Maternal factors regulate the development of the embryo and silence paternal genes during early ...
May 31, 2011 |
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In time for spring, biologist illuminates how seedlings regulate growth
With seedlings and shoots still poking their leafy tops out of the soil, it's hard to read the newly published research of Brown University biologist Alison DeLong without musing that it provides a deeper understanding of ...
Apr 21, 2011 |
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Pushy neighbour sends several messages
How does a plant ensure that one cell remains responsible for making root cells for the rest of its life? The plant embryo contains the transcription factor MONOPTEROS. This tells its neighbouring cell to become a centre ...
Mar 30, 2010 |
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How plants put down roots
In the beginning is the fertilized egg cell. Following numerous cell divisions, it then develops into a complex organism with different organs and tissues. The largely unexplained process whereby the cells ...
Mar 15, 2010 |
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Signal proteins for plant stem cells discovered
Wageningen University (The Netherlands) biochemist Dolf Weijers and his German colleagues have discovered how stem cells in a plant embryo are formed. The cells communicate with one another via the transportation of a protein, ...
Mar 11, 2010 |
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Root or shoot: Power struggle between genetic master switches decides stem cell fate
The first order of business for any fledgling plant embryo is to determine which end grows the shoot and which end puts down roots. Now, researchers at the Salk Institute expose the turf wars between two groups ...
Feb 28, 2010 |
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Scientists discover how certain hormones control aspects of root branching in plants
(PhysOrg.com) -- Roots are the most underestimated parts of a plant, even though they are crucial for water and nutrient uptake and consequently growth. In a world of changing water availability and an ever-increasing ...
Jan 27, 2010 |
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Secrets in a seed: Clues into the evolution of the first flowers
Approximately 120-130 million years ago, one of the most significant events in the history of the Earth occurred: the first flowering plants, or angiosperms, arose. In the late 1800s, Darwin referred to their development ...
Sep 14, 2009 |
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At Long Last, How Plants Make Eggs
(PhysOrg.com) -- A long-standing mystery surrounding a fundamental process in plant biology has been solved by a team of scientists at the University of California, Davis.
Jun 04, 2009 |
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