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2015 | 37 | 08 |

Tytuł artykułu

Physiological response to potassium deficiency in three sweet potato (Ipomoea batatas [L.] Lam.) genotypes differing in potassium utilization efficiency

Warianty tytułu

Języki publikacji

EN

Abstrakty

EN
Potassium (K+) is an essential mineral element affecting plant growth and development. The aim of this study was to investigate the physiological response to K+ deficiency in three sweet potato (Ipomoea batatas [L.] Lam.) cultivars with differing K+ utilization efficiencies (KUE). The effects on plant growth status, physiological characteristics, leaf ultrastructure, and photosynthesis were examined. The results showed that K+ deficiency significantly decreased total biomass productivity, root yield, photosynthetic efficiency, and chlorophyll (Chl) content, while increased leaf sucrose and proline content of the three cultivars. K+ deficiency caused acute damage to chloroplast ultrastructure associated with leaf Chl biosynthesis and photosynthate accumulation, and also disturbed the protective enzymes involved in the antioxidative defense system. Compared with the other two cultivars, Xushu32 had higher root yield and better growth performance under K+ deficiency, which was mainly attributed to its high KUE and greater carbohydrate conversion and net photosynthetic efficiency. As a whole, these data suggest that greater tolerance to K+ deficiency among sweet potato genotypes is associated to the capability to mount a stronger physiological stress response during growth.

Słowa kluczowe

Wydawca

-

Rocznik

Tom

37

Numer

08

Opis fizyczny

fig.,ref.

Twórcy

autor
  • College of Agronomy, Nanjing Agricultural University, Nanjing, 210095, China
  • Sweetpotato Research Institute, Chinese Academy of Agricultural Sciences, Xuzhou, 221121, China
  • Key Laboratory of Sweetpotato Biology and Genetic Breeding, Ministry of Agriculture, Xuzhou, 221121, China
autor
  • Sweetpotato Research Institute, Chinese Academy of Agricultural Sciences, Xuzhou, 221121, China
  • Key Laboratory of Sweetpotato Biology and Genetic Breeding, Ministry of Agriculture, Xuzhou, 221121, China
autor
  • Sweetpotato Research Institute, Chinese Academy of Agricultural Sciences, Xuzhou, 221121, China
  • Key Laboratory of Sweetpotato Biology and Genetic Breeding, Ministry of Agriculture, Xuzhou, 221121, China
autor
  • Sweetpotato Research Institute, Chinese Academy of Agricultural Sciences, Xuzhou, 221121, China
  • Key Laboratory of Sweetpotato Biology and Genetic Breeding, Ministry of Agriculture, Xuzhou, 221121, China
autor
  • College of Agronomy, Nanjing Agricultural University, Nanjing, 210095, China
autor
  • Sweetpotato Research Institute, Chinese Academy of Agricultural Sciences, Xuzhou, 221121, China
  • Key Laboratory of Sweetpotato Biology and Genetic Breeding, Ministry of Agriculture, Xuzhou, 221121, China
autor
  • College of Agronomy, Nanjing Agricultural University, Nanjing, 210095, China

Bibliografia

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Typ dokumentu

Bibliografia

Identyfikatory

Identyfikator YADDA

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