Appropriate NH<sub class="a-plus-plus">4sub> <sup class="a-plus-plus">+sup>: NO<sub class="a-plus-plus">3sub> <sup class="a-plus-plus">−sup> ratio improves low light tolerance of mini Chinese cabbage seedlings

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• 作者：Linli Hu ; Weibiao Liao ; Mohammed Mujitaba Dawuda ; Jihua Yu ; Jian Lv
• 关键词：Chlorophyll fluorescence imaging ; Calvin cycle ; Relative gene expression ; Low light fluence ; Ammonium ; nitrate ratio
• 刊名：BMC Plant Biology
• 出版年：2017
• 出版时间：December 2017
• 年：2017
• 卷：17
• 期：1
• 全文大小：4007KB
• 刊物主题：Plant Sciences; Agriculture; Tree Biology;
• 出版者：BioMed Central
• ISSN：1471-2229
• 卷排序：17

文摘

BackgroundIn northwest of China, mini Chinese cabbage (Brassica pekinensis) is highly valued by consumers, and is widely cultivated during winter in solar-greenhouses where low light (LL) fluence (between 85 and 150 μmol m−2 s−1 in day) is a major abiotic stress factor limiting plant growth and crop productivity. The mechanisms with which various NH<sub>4sub>+: NO<sub>3sub>−sup> ratios affected growth and photosynthesis of mini Chinese cabbage under normal (200 μmol m−2 s−1) and low (100 μmol m−2 s−1) light conditions was investigated. The four solutions with different ratios of NH<sub>4sub>+: NO<sub>3sub>−sup> applied were 0:100, 10:90, 15:85 and 25:75 with the set up in a glasshouse in hydroponic culture. The most appropriate NH<sub>4sub>+: NO<sub>3sub>−sup> ratio that improved the tolerance of mini Chinese cabbage seedlings to LL was found in our current study.