Dictionary definition: stomium

Dictionary definition: stomium
A Dictionary of Biology;      244 words ...stomium A region of thin-walled cells in certain spore-producing structures that ruptures to release the spores. For example, in the sporangium of the fern Dryopteris the stomium ruptures when the annulus dries out.

Article: The arabidopsis DELAYED DEHISCENCE 1 gene encodes an enzyme in ...
Plant Cell;  July 1, 2000 ;     700+ words ... ... dehiscence1 defect is caused by a delay in the stomium degeneration program. The gene disrupted ... DEHISCENCE1 mRNA was not detected in the stomium and septum cells of the anther that are ... between the locules of each theca. The stomium, which is derived from the outer Ll layer ...

Article: Arabidopsis MYB26/MALE STERILE35 Regulates Secondary Thickening ...
Plant Cell;  February 1, 2007 ;     700+ words ... ... weakness in the epidermis, known as the stomium, and retraction of the anther wall to widen the stomium and permit pollen release. During microspore ... Dawson et al., 1999). The cells of the stomium and circular cell cluster (present in tobacco ...

Article: The ANTHER INDEHISCENCE1 Gene Encoding a Single MYB Domain ...
Plant Physiology;  July 1, 2004 ;     700+ words ... ... due to failure in septum degradation and stomium breakage, resulting in sterility. Type ... three tissues-endothecium, septum, and stomium-play important roles in anther dehiscence ... the two adjacent anther locules. The stomium is a single layer of specialized epidermal ...

Article: Novel anther-specific myb genes from tobacco as putative ...
Plant Physiology;  August 1, 2001 ;     700+ words ... ... and gametophytic tissues of the anther including tapetum, stomium, vascular tissue, and developing pollen. Random binding ... strict co-expression of NtmybAS and gPAL1 in the tapetum and stomium. Despite abundant expression of NtmybAS transcripts in mature ...

Article: New plant physiology research from University of Guelph ...
Science Letter;  March 10, 2009 ;     700+ words ... ... layer/endothecium, and the epidermal cells surrounding the stomium all exhibit features consistent with progression through PCD ... interlocular septum and in the epidermal cells surrounding the stomium relatively early in development, SlCysEP accumulates later ...

Article: Aquaporins of the PIP2 Class Are Required for Efficient Anther ...
Plant Physiology;  March 1, 2005 ;     700+ words ... ... in an outward-bending force that opens the anther when the stomium degenerates. Experimental evidence has shown that both the ... correctly timed degeneration of the circular cell cluster and stomium are indispensable for dehiscence to occur (Beals and Goldberg ...