Method for predicting photosynthetic gas exchange parameters by utilizing lettuce chlorophyll fluorescence parameters

Abstract

The invention discloses a method for predicting photosynthetic gas exchange parameters by utilizing lettuce chlorophyll fluorescence parameters, and belongs to the field of plant physiological research. The chlorophyll fluorescence parameters and the photosynthetic gas exchange parameters are independent index systems for characterizing the photosynthetic capacity of the plants. According to the technology, the maximum apparent photosynthetic electron transfer rate and the photosaturation point thereof in lettuce chlorophyll fluorescence parameters and the maximum net photosynthetic rate and the photosaturation point thereof in photosynthetic gas exchange parameters are respectively measured and calculated in the same period, the chlorophyll fluorescence parameters are taken as independentvariables X, and the photosynthetic gas exchange parameters are taken as dependent variables Y; according to an equation of Y = aXb, respectively a fitting equation of the maximum surface sightseeingsynthetic electron transfer rate-maximum net photosynthetic rate and a fitting equation of the maximum surface sightseeing synthetic electron transfer rate light saturation point-the maximum net photosynthetic rate light saturation point, and respective regression coefficients a and b are calculated; thus, an equation for predicting partial parameters of photosynthetic gas exchange based on partial parameters of chlorophyll fluorescence is obtained, and internal unification between two index systems is revealed.

Description

technical field [0001] This technology discloses a method for predicting photosynthetic gas exchange parameters using lettuce chlorophyll fluorescence parameters to reveal the internal relationship between chlorophyll fluorescence parameters and photosynthetic gas exchange parameters, which can represent the photosynthetic capacity of plants. A technical field characterized by an inherent unity. Background technique [0002] Lettuce has become one of the most commonly grown vegetables in the world because of its convenient eating, rich nutrition, and certain medical and health functions. Therefore, research on the high-yield cultivation of lettuce has been continuously carried out. In view of the fact that photosynthesis is the basis for constructing the yield of all crops, the research on the photosynthetic characteristics of lettuce has become the focus of the high-yield cultivation research of lettuce. At present, chlorophyll fluorescence parameters and photosynthetic g...

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Problems solved by technology

However, this method has strict requirements on environmental conditions and measurement time. It usually needs to be carried out at 9:00-10:00 am in sunny weather, and it takes nearly 25-30 minutes to measure a sample. In this way, it can only measure 3 samples

However, many studies often need to design multiple treatments, and each treatment needs to be repeated more than 3 times. Therefore, it is difficult to measure samples of different treatments in a short period of time, that is, parallel measurement, which will ultimately affect the accuracy of the research results.

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