Water-use efficiency and nitrogen uptake in rice seedlings grown under different light quality

  • Chang-Chang CHEN National Research Institute of Chinese Medicine, Ministry of Health and Welfare, Beitou 11221, Taipei https://orcid.org/0000-0002-0484-6631
  • Wen-Dar HUANG Department of Agronomy, National Taiwan University, Daan 10617, Taipei
  • Zhi-Wei YANG Taoyuan District Agricultural Research and Extension Station, Council of Agriculture, Executive Yuan, Sinwu 32745, Taoyuan
  • Chi-Ming YANG Biodiversity Research Center, Academia Sinica, Nankang 11529, Taipei
  • Karyne ROGERS National Isotope Centre, GNS Science, Lower Hutt 5040; Institute of Quality and Standards for Agricultural Products, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021 https://orcid.org/0000-0001-8464-4337
Keywords: carbon isotope discrimination; light quality; nitrogen uptake; rice seedling; water-use efficiency


Rice (Oryza sativa L.) cultivars ‘Taichung shen 10’ (‘TCS10’) and ‘IR1552’ were hydroponically grown under different light conditions to investigate the effect of light quality on their biomass, transpiration, water-use efficiency (WUE), carbon isotope discrimination (Δ), seed nitrogen (N) contribution and nitrogen uptake ability from the hydroponic nutrient solutions. Light emitting diode (LED) lighting systems were used to control light quality. Different light treatments were applied to the rice seedlings including red (R), green (G), and blue light (B), with red + blue light (RB) as control. The photon flux density was set at 105 μmol m-2 s-1. WUE and Δ were combined to evaluate whole-plant WUE. Improved whole-plant WUE was observed for both cultivars under R and RB light due to lower transpiration rates than under B light. Green light also improved Δ in both rice seedling cultivars. Seed N contribution of both cultivars was stable across all light treatments, while improved N uptake ability was observed under B and RB light. In addition, N uptake in ‘IR1552’ rice seedling cultivars did not respond as favourably to green light as ‘TCS10’ cultivars.


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How to Cite
CHEN, C.-C., HUANG, W.-D., YANG, Z.-W., YANG, C.-M., & ROGERS, K. (2021). Water-use efficiency and nitrogen uptake in rice seedlings grown under different light quality. Notulae Botanicae Horti Agrobotanici Cluj-Napoca, 49(1), 12127. https://doi.org/10.15835/nbha49112127
Research Articles
DOI: 10.15835/nbha49112127