Please use this identifier to cite or link to this item: http://hdl.handle.net/10497/18502
Title: Growth irradiance effects on productivity, photosynthesis, nitrate accumulation and assimilation of aeroponically grown Brassica alboglabra
Authors: He, Jie
Lim, Lang Ing
Qin, Lin
Keywords: Aeroponic culture
Growth irradiance
Nitrate accumulation
Photosynthesis
Productivity
Issue Date: 2015
Citation: He, J., Lim, L. I., & Qin, L. (2015). Growth irradiance effects on productivity, photosynthesis, nitrate accumulation and assimilation of aeroponically grown Brassica alboglabra. Journal of Plant Nutrition, 38(7), 1022-1035. http://dx.doi.org/10.1080/01904167.2014.963118
Abstract: Brassica alboglabra plants were first grown aeroponically with full nutrients under full sunlight with average midday photosynthetic photon flux density (PPFD) of 1200 μmol m−2 s−1. Thirty days after transplanting, plants were respectively, subjected to 10 days of average midday PPFD of 1200 (control, L1), 600 (L2) and 300 μmol m−2 s−1 (L3). Productivity, photosynthetic CO2 assimilation and stomatal conductance were significantly lower in low-light (L2 and L3) plants than in high-light (L1) plants. Low light plants had the highest nitrate (NO3−) accumulation in the petioles. Low light also had an inverse effect total reduced N content. After different light treatments, all plants were re-exposed to another 10 days of full sunlight. Low-light plants demonstrated their ability to recover their photosynthetic rate, enhance productivity and reduce the NO3− concentration. These results have led to the recommendation of not harvesting this popular vegetable during or immediately after cloudy weather conditions.
Description: This is the final draft, after peer-review, of a manuscript published in Journal of Plant Nutrition. The published version is available online at http://dx.doi.org/10.1080/01904167.2014.963118
URI: http://hdl.handle.net/10497/18502
ISSN: 0190-4167 (print)
1532-4087 (online)
Other Identifiers: 10.1080/01904167.2014.963118
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