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金沙江干热河谷地区的主要造林树种中，以马占相思、山毛豆、真珠相思、大叶相思、台湾相思、绢毛相思、坡柳在旱季游离脯氨酸累积较多；赤桉、泰国赤桉、柠檬桉、尾叶桉、大叶桉、新银合欢、苏门答腊金合欢、滇刺枣无明显差异。无论从种属间或种源地，还是不同生态类型，都看不出游离脯氨酸的累积与抗旱性之间有明显的相关关系。作者认为，用游离脯氨酸作为植物抗旱性指标有一定局部性，但用它作为某些树种在干旱胁迫时植物体发生变化的一个比较敏感的参数或指标则比较适合
Among the main afforestation species in the Jinshajiang dry-hot valley, the accumulation of free proline in the dry season was higher in Acacia mangium, Phyllostachys pubescens, Acacia confusa, Acacia confusa, Acacia crassicarpa, Eucalyptus, Eucalyptus citriodora, Eucalyptus urophylla, Eucalyptus grandis, New Acacia, Acacia Sumatran, Dianthus chinensis had no significant difference. No obvious correlations were found between the accumulation of free proline and drought resistance, whether from species or provenance or from different ecotypes. The authors believe that the use of free proline as a marker of plant drought resistance has a certain locality, but it is used as some tree species in drought stress plants when a more sensitive parameters or indicators are more suitable