Acclimation of Palmer Amaranth (Amaranthus palmeri) to Shading
作者： Prashant Jha , Jason K. Norsworthy , Melissa B. Riley , Douglas G. Bielenberg , William Bridges
DOI: 10.1614/WS-07-203.1
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摘要: Abstract Experiments were conducted to investigate the acclimation of Palmer amaranth shading. Plants grown in field beneath black shade cloths providing 47 and 87% full sunlight (no shading). All photosynthetic measurements taken 4 wk after initiating treatments. Photosynthetic rates under 47% increased with increasing active radiation (PAR) similar 0% shade-grown plants. Light-saturated predicted beyond highest measured PAR 1,200 µmol m−2 s−1 for plants 0 shade. acclimated shading by decreasing light-saturated from 60.5 sun conditions 26.4 lowered their light compensation point. Rate increase plant height was among responded a 13 44% reduction leaf appearance rate (leaf n...
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