CAJ | 학술논문

采用营养液培养，研究了低磷、铝毒单独及复合胁迫对耐铝性不同的水稻基因型(甬优8号和秀水132)幼苗生长、叶绿素和游离脯氨酸含量、抗氧化酶活性和膜质过氧化水平的影响。结果表明，低磷和铝毒处理均显著抑制水稻幼苗生长，并导致叶绿素含量下降，叶片中游离脯氨酸和根系及叶片中丙二醛(MDA)含量大幅上升，根系中过氧化物酶(POD)和超氧化物歧化酶(SOD)活性上升，而叶片中两类抗氧化酶活性下降。胁迫处理对甬优8号的生长抑制更强，秀水132表现为耐铝兼耐低磷胁迫。复合处理下低磷可加剧铝毒对水稻幼苗生长的抑制，并诱发更严重的氧化胁迫。
채용영양액배양，연구료저린、려독단독급복합협박대내려성불동적수도기인형(용우8호화수수132)유묘생장、협록소화유리포안산함량、항양화매활성화막질과양화수평적영향。결과표명，저린화려독처리균현저억제수도유묘생장，병도치협록소함량하강，협편중유리포안산화근계급협편중병이철(MDA)함량대폭상승，근계중과양화물매(POD)화초양화물기화매(SOD)활성상승，이협편중량류항양화매활성하강。협박처리대용우8호적생장억제경강，수수132표현위내려겸내저린협박。복합처리하저린가가극려독대수도유묘생장적억제，병유발경엄중적양화협박。
Plants growing in acid soils may suffer both phosphorus (P ) deficiency and aluminum (Al ) toxicity. Hydroponic experiments were undertaken to assess the single and combination effects of Al toxicity and low P stress on seedling growth,chlorophyll and proline contents,antioxidative response and lipid peroxidation of two rice genotypes (Yongyou 8 and Xiushui 132)differing in Al tolerance.Al toxicity and P deficiency both inhibited rice seedling growth. The development of toxic symptoms was characterized by reduced chlorophyll content, increased proline and malondialdehyde contents in both roots and leaves,and increased peroxidase and superoxide dismutase activities in roots,but decreased in leaves.The stress condition induced more severe growth inhibition and oxidative stress in Yongyou 8,and Xiushui 132 showed higher tolerance to both Al toxicity and P deficiency.P deficiency aggravated Al toxicity to plant growth and induced more severe lipid peroxidation.