Effects of low temperature and low light intensity on nutrient and dry matter distribution in greenhose tomato (Lycopersicon esculentum Mill. ) seedlings

• Published in: Nanjing Xinxi Gongcheng Daxue Xuebao Vol. 12; no. 1; pp. 108 - 117
• Main Authors: Yang, Zaiqiang, Yuan, Changhong, Ding, Yuhui, Hou, Mengyuan, Zhang, Manyi
• Format: Journal Article
• Language: Chinese
• Published: Nanjing Nanjing University of Information Science & Technology 01.02.2020
• Subjects: Amino acids; Dry matter; Exposure; Greenhouses; Leaves; Light intensity; Low temperature; Luminous intensity; Nutrient content; Nutrients; Organs; Photosynthetically active radiation; Proteins; Radiation; Roots; Seedlings; Stems; Temperature effects; Tomatoes
• ISSN: 1674-7070
• DOI: 10.13878/j.enki.jnuist.2020.01.014

In this study, we examined the influence of low temperature and low light intensity stress on the soluble sugar, soluble protein, and free amino acid content in different organs and on dry matter distribution in greenhouse tomato seedlings.We used Photosynthetically Active Radiation (PAR) at 800 μmol·m -2·s -1 and temperature of 25 °C as control(CK) ,and set up an experiment involving six treatments [ L1T1 (PAR 200 μmol · m 2·s -1,8 °C) , L1T2 (PAR 200 μmol-m-2 · s_1,6 °C),L1T3 (PAR 200 pmol · m_2-s_l,8 °C),L2T1 (PAR 400 μmol·m_2· s_l ,4 °C ) ,L2T2 (PAR 400 μmol · m_2·s_1 ,6 °C) ,and L2T3 (PAR 400 μmol·m_2·s_1 ,8 °C ) ] that were monitored for 6,12,24,48,and 72 h Respectively.The results showed that the dry matter distribution ratio in the underground part of the plant was lower than that in the ground-level parts and opposite to that in the aboveground part. Low temperature and low light intensity stress significantly reduced the soluble sugar, soluble protein, and free amino acid content of the stems and le