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Ammonium in relation to proline accumulation in detached rice leaves

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Abstract

Ammonium accumulation in relation to prolineaccumulation in detached rice leaves under stressconditions was investigated. Ammonium accumulation indark-treated detached rice leaves preceded prolineaccumulation. Ammonium accumulation caused by waterstress coincided closely with proline accumulation indetached rice leaves. Exogenous NH4Cl andmethionine sulfoximine (MSO), which caused anaccumulation of ammonium in detached rice leaves,increased proline content. It was found that prolinein NH4Cl- or MSO-treated rice leaves is lessutilized than in water-treated rice leaves (controls). These results are in agreement with the observationthat a decrease in proline utilization contributes tothe accumulation of proline in dark-treated and waterstressed rice leaves. Although ammonium contentincreased in Cd- and Cu-treated rice leaves, theincrease in ammonium content was only observed afterthe increase in proline content.

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Authors and Affiliations

  1. Department of Agronomy, National Taiwan University, Taipei, Taiwan, Republic of China

    Chao Wei Yang

  2. Department of Agronomy, National Taiwan University, Taipei, Taiwan, Republic of China

    Ching Huei Kao

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  1. Chao Wei Yang
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  2. Ching Huei Kao
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Yang, C.W., Kao, C.H. Ammonium in relation to proline accumulation in detached rice leaves. Plant Growth Regulation 30, 139–144 (2000). https://doi.org/10.1023/A:1006329919243

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