Long-term Blue Light Effects on the Histology of Lettuce and Soybean Leaves and Stems
By T. Dougher, B. Bugbee. Journal of the American Society for Horticultural Science, 2004
105 citations recorded by the source corpus.
Blue light (320 to 496 nm) alters hypocotyl and stem elongation and leaf expansion in short-term, cell-level experiments, but histological effects of blue light in long-term studies of whole plants have not been described. We measured cell size and number in stems of soybean (Glycine max L.) and leaves of soybean and lettuce (Lactuca sativa L.), at two blue light fractions. Short-term studies have shown that cell expansion in stems is rapidly inhibited when etiolated tissue is exposed to blue light. However, under long-term light exposure, an increase in the blue light fraction from <0.1% to 26% decreased internode length, specifically by inhibiting soybean cell division in stems. In contrast, an increase in blue light fraction from 6% to 26% reduced soybean leaf area by decreasing cell expansion. Surprisingly, lettuce leaf area increased with increasing blue light fraction (0% to 6%), which was attributed to a 3.1-fold increase in cell expansion and a 1.6-fold increase in cell division.
Subfields: Molecular Biology, Plant Science
View Paper: https://www.semanticscholar.org/paper/b1bc79c68aacb39e0e066a0b9858f67502faf1c8
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Citations in the corpus
- Toward an optimal spectral quality for plant growth and development: The importance of radiation capture (2016, background): “Increasing blue light fraction inhibits cell division, cell expansion, and thus leaf area (Dougher and Bugbee, 2004).”