Differences in Potassium Responsiveness Between Tubers and Related Physiological Characteristics of Different Potato Cultivars

doi:10.7668/hbnxb.20190071

Abstract

Abstract: In order to study the changes of potassium content and other related physiological characteristics in tubers of different potato varieties at seedling stage with different potassium supply levels, field experiments were conducted to study Dongnong 310, Yanshu 4 and Zhongshu 5 at three potassium levels. The results showed that under the three levels of K₀, K₁ and K₂, the potassium content of tubers in different varieties was significantly different, and the potassium content of Dongnong 310 seedlings was much higher than that of Zhongshu 5 and Yanshu 4. Correlation between potassium content in potato and chlorophyll (SPAD), root activity (RV), malondialdehyde content (MDA), sucrose synthase (SS) and sucrose phosphate synthase (SPS) under low potassium and high potassium conditions analysis, when the potassium level is low, root activity and related enzyme activity become the limiting factors affecting potassium content; while under high potassium conditions, potassium content is positively correlated with SPAD, but negatively correlated with others. Therefore, as the level of potassium supply increases, the supply of potassium becomes a limiting factor for the increase in tuber potassium content.

Key words: Potato, Potassium content, Potassium level, Correlation analysis

CLC Number:

S532.01

SHI Jiawen, PAN Feng, CHEN Ruonan, SHI Ying. Differences in Potassium Responsiveness Between Tubers and Related Physiological Characteristics of Different Potato Cultivars[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2019, 34(S1): 78-84. doi: 10.7668/hbnxb.20190071.

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