%0 Journal Article %1 Hou1997 %A Hou, J.Q. %A Kendall, E.J. %A Simpson, G.M. %C Department of Medical Imaging, University of Saskatchewan, 103 Hospital Drive, Saskatoon, Sask. S7N 0W8, Canada %D 1997 %J Journal of Experimental Botany %K Arena Water and coat distribution, dormant fatua, light modification, non-dormant quality, seed seeds, uptake water %N 308 %P 683--692 %T Water uptake and distribution in non-dormant and dormant wild oat (Avena fatua L.) caryopses %U http://www.scopus.com/scopus/inward/record.url?eid=2-s2.0-0039793626&partnerID=40&rel=R8.2.0 %V 48 %X The influence of seed coat modification and light quality on water uptake and distribution in caryopses of dormant and non-dormant lines of wild oat (Arena fatua L.) was determined using NMR microimaging. Non-dormant seeds absorbed water more rapidly than dormant seeds during imbibition on distilled water. This effect was detected first in the embryo-scutellar region (8 h) and later in the proximal endosperm (12 h). Cuffing the testa and pericarp close to the embryo or scarification with KOH promoted rapid embryo/scutellum hydration and germination. Cuffing at the middle part of the caryopsis did not enhance embryo hydration nor did it greatly improve germination. The sensitivity of water distribution to the phytochrome germination effect was examined. Significant differences in imbibitional water uptake by embryoscutellum tissue were detected by 18 h following redlight (germination promoter) compared with far-red (germination inhibitor) treatment. The results indicated that both the rate and the sequence of embryo/scutellum hydration were important in initiating germination in dormant seeds. A refinement of the model that describes water imbibition in wild oat seeds during the early stages of germination is discussed.

@article{Hou1997, abstract = {The influence of seed coat modification and light quality on water uptake and distribution in caryopses of dormant and non-dormant lines of wild oat (Arena fatua L.) was determined using NMR microimaging. Non-dormant seeds absorbed water more rapidly than dormant seeds during imbibition on distilled water. This effect was detected first in the embryo-scutellar region (8 h) and later in the proximal endosperm (12 h). Cuffing the testa and pericarp close to the embryo or scarification with KOH promoted rapid embryo/scutellum hydration and germination. Cuffing at the middle part of the caryopsis did not enhance embryo hydration nor did it greatly improve germination. The sensitivity of water distribution to the phytochrome germination effect was examined. Significant differences in imbibitional water uptake by embryoscutellum tissue were detected by 18 h following redlight (germination promoter) compared with far-red (germination inhibitor) treatment. The results indicated that both the rate and the sequence of embryo/scutellum hydration were important in initiating germination in dormant seeds. A refinement of the model that describes water imbibition in wild oat seeds during the early stages of germination is discussed.}, added-at = {2012-12-19T21:37:51.000+0100}, address = {Department of Medical Imaging, University of Saskatchewan, 103 Hospital Drive, Saskatoon, Sask. S7N 0W8, Canada}, author = {Hou, J.Q. and Kendall, E.J. and Simpson, G.M.}, biburl = {https://www.bibsonomy.org/bibtex/2f83f756e6cf8b3f075365a38c9df3b72/gruwel}, comment = {Cited By (since 1996): 11 Export Date: 25 September 2008 Source: Scopus}, interhash = {1853edbc8058514a67eed8d73526ca21}, intrahash = {f83f756e6cf8b3f075365a38c9df3b72}, journal = {Journal of Experimental Botany}, keywords = {Arena Water and coat distribution, dormant fatua, light modification, non-dormant quality, seed seeds, uptake water}, number = 308, owner = {administrator}, pages = {683--692}, timestamp = {2012-12-19T21:37:56.000+0100}, title = {Water uptake and distribution in non-dormant and dormant wild oat (Avena fatua L.) caryopses}, url = {http://www.scopus.com/scopus/inward/record.url?eid=2-s2.0-0039793626&partnerID=40&rel=R8.2.0}, volume = 48, year = 1997 }