Response to Different Levels of Low Light Stress of Two Varieties of Tomatos

Two tomato varieties of 'Liaoyuanduoli' and 'moneymaker' were used in the experiment,in order to indicate the response to different levels of low light stress of two varieties of tomatoes in greenhouse.The results indicated that with light intensity decreasing,the specific leaf area and chlorophyll a and b of two varieties increased,and the lower of light,the more increase was obvious.As a result,under low light,leaf areas of plants increased and leaves became thinner.The leaf area and content of chlorophyll a and b of 'Liaoyuanduoli' increased obviously compared to that of 'moneymaker'.With the light intensity decreasing,intercellular CO2 concentration(Ci) increased with the net photosynthetic rate(Pn) and the stomata conductance(Gs) decreasing,and the starch and the carbohydrates content in leaves decreased.All of these suggested that response to different levels of low light stress of two varieties of tomatoes were similar.The tolerant to low light of 'Liaoyuanduoli' was obviously better than that of 'moneymaker'.