Magnetic resonance microimaging indicates water diffusion correlates with dormancy induction in cultured hybrid poplar (Populus spp.) buds

Autor:	Karen K. Tanino, Salim N. Silim, Lee Kalcsits, Edward J. Kendall
Rok vydání:	2009
Předmět:	photoperiodism Physiology Photoperiod Water Tissue level Plant Science Biology Magnetic Resonance Imaging Populus Gene Expression Regulation Plant Hybrid poplar Axillary bud Botany Dormancy Water diffusion Water content Woody plant
Zdroj:	Tree Physiology. 29:1269-1277
ISSN:	1758-4469 0829-318X
DOI:	10.1093/treephys/tpp062
Popis:	Water content and mobility, which are factors known to be associated with dormancy induction in woody plants on a tissue level, were measured using non-destructive magnetic resonance microimaging (MRMI). Two cultured poplar clones ('Okanese' - temperature-insensitive dormancy and 'Walker' - temperature-sensitive dormancy) were subjected to dormancy differentiating temperature regimes, 18.5/3.5 degrees C and 18.5/13.5 degrees C (day/night), under a short photoperiod. Apparent diffusion coefficient, an indicator of water mobility, correlated with dormancy development in the axillary bud and vascular bud trace regions. In contrast, T(1) relaxation time, an indicator of static biophysical water properties, did not correlate significantly with dormancy in the regions that were examined. Although MRMI studies using T(1) relaxation measurements have dominated the phytological field, our work indicates that water mobility is an important factor in studies examining water changes during dormancy induction in the critical tissues of woody plants.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e29fb33f9e25ae7e3353ed68307915fb https://doi.org/10.1093/treephys/tpp062 Zobrazit plný text záznamu Plný text ve formátu PDF