Effects of sub-low temperature and drought stress on characteristics of photosynthetic and fluorescence kinetics in tomato leaves. Effects of sub-low temperature and drought stress on root morphology and leaf structure of tomato seedlings. Effects of Sub-low Temperature and Potassium Fertilizer on Photosynthesis and Fruit Quality of Greenhouse Tomato Effects of Short-term Sub-low Night Temperature Treatment and Recovery on the Photosynthesis and Sucrose-metabolizing of Tomato Leaves Effects of Short-term Sub-low Night Temperature Treatment and Recovery on the Photosynthesis and Sucrose-metabolizing of Tomato Leaves Effects of exogenous melatonin on nitrogen metabolism and osmotic adjustment substances of melon seedlings under sub-low temperature.