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This article in CS

  1. Vol. 33 No. 1, p. 174-177
     
    Received: Sept 3, 1991


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doi:10.2135/cropsci1993.0011183X003300010031x

Carbohydrate Metabolism Enzymes in Developing Grains of Rice Cultured in Solution with Calcium Supplement

  1. Meng-Lei Wei and
  2. Jih-Min Sung 
  1. Dep. of Agronomy, National Chung Hsing Univ., Taichung, Taiwan, 40227

Abstract

Abstract

Calcium is known to promote NH4 uptake and straw growth in rice (Oryza sative L). Calcium enhancement of grain development has received little attention, however. This study evaluated the efffect of 300 mg Ca L-1 on grain growth in solution-cultured rice plants. It was found that both short-term and long-term supplemental Ca stimulated carbohydrate accumulation, and subsequently resulted in greater rain growth. Stimulated carbohydrate accumulation was linked to Ca-enhanced activity of enzymes, including sucrose synthase, invertase, PPi-phosphofructokinase, uridine diphosphate-glucose pyrophosphorylase, and adenosine pyrophosphorylase, which are involved in sucrose to starch conversion.

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