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Influence of K~+、Na~+ and HCO_3~- on Photosynthesis of Soybean Seedlings

Yang Yu

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Abstract

In this study,seedling of Tiefeng 31 were sprayed with 1500 mg·L-1 KHCO3 and NaHCO3,respectively,and determined the photosynthetic rate,soluble sugar,photosynthetic pigment and other physiological indexes to explore the effect of K+,Na+ and HCO-3on photosynthesis of soybean seedlings.The results showed that:compared with water spraying control,K+,Na+ and HCO-3improved photosynthetic rate,the content of soluble sugar,chlorophyll a,chlorophyll b,and the ratio of chlorophyll b in total chlorophyll;promoted soybean seedlings photosynthesis by providing more assimilatory power to dark reactions carbon fixation;and enhanced the activities of ATP enzyme,photophosphorylation and PEPC.In addition,HCO-3played a more important role in promoting chlorophyll b synthesis and improving photosynthetic rate.NaHCO3 significantly increased the content of Rubisco.For other physiological indexes but the content of Rubisco,the promotion effect of K+ was higher than Na+.

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What this paper is about

In this study,seedling of Tiefeng 31 were sprayed with 1500 mg·L-1 KHCO3 and NaHCO3,respectively,and determined the photosynthetic rate,soluble sugar,photosynthetic pigment and other physiological indexes to explore the effect of K+,Na+ and HCO-3on photosynthesis of soybean seedlings.The results showed that:compared with water spraying control,K+,Na+ and HCO-3improved photosynthetic rate,the content of soluble sugar,chlorophyll a,chlorophyll b,and the ratio of chlorophyll b in total chlorophyll;promoted soybean seedlings photosynthesis by providing more assimilatory power to dark reactions carbon fixation;and enhanced the activities of ATP enzyme,photophosphorylation and PEPC.In addition,HCO-3played a more important role in promoting chlorophyll b synthesis and improving photosynthetic rate.NaHCO3 significantly increased the content of Rubisco.For other physiological indexes but the content of Rubisco,the promotion effect of K+ was higher than Na+.

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Available abstract

In this study,seedling of Tiefeng 31 were sprayed with 1500 mg·L-1 KHCO3 and NaHCO3,respectively,and determined the photosynthetic rate,soluble sugar,photosynthetic pigment and other physiological indexes to explore the effect of K+,Na+ and HCO-3on photosynthesis of soybean seedlings.The results showed that:compared with water spraying control,K+,Na+ and HCO-3improved photosynthetic rate,the content of soluble sugar,chlorophyll a,chlorophyll b,and the ratio of chlorophyll b in total chlorophyll;promoted soybean seedlings photosynthesis by providing more assimilatory power to dark reactions carbon fixation;and enhanced the activities of ATP enzyme,photophosphorylation and PEPC.In addition,HCO-3played a more important role in promoting chlorophyll b synthesis and improving photosynthetic rate.NaHCO3 significantly increased the content of Rubisco.For other physiological indexes but the content of Rubisco,the promotion effect of K+ was higher than Na+.

Key concepts: Photosynthesis, Chlorophyll, RuBisCO, Chemistry, Sugar, Carbon fixation, Chlorophyll c, Photosynthetic pigment

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Influence of K~+、Na~+ and HCO_3~- on Photosynthesis of Soybean Seedlings — Research Paper | ScholarLens