低磷胁迫对玉米叶片色素和形态的影响.PDF

2009 1 17 1 Chinese Journal of Eco-Agriculture, Jan. 2009, 17(1): 125−129 DOI: 10.3724/SP.J.1011.2009.00125 * 1 2 1 1 1 1 陈俊意 蔡一林 徐 莉 杨治国 甘晓玲 潘婷妮 (1. 400030; 2. 400716) 通过大田试验, 以 4 个基因型玉米为材料, 研究了低磷胁迫下玉米叶片色素和形态变化及其内部生 理机制。结果表明, 低磷条件下, 玉米叶片叶绿素/ 类胡萝卜素、叶绿素/ 紫色素和叶绿素/ 红色素均减少, 其中 基因型“7922”和“掖 107”的叶绿素/ 类胡萝卜素、叶绿素/ 紫色素和叶绿素/ 红色素减少幅度较大, 为高磷条 件下的 0.4 ～0.8 倍, 且减少幅度高于“178”和“*082”。低磷条件下, 苯丙氨酸解氨酶(PAL)活性和总黄酮含 量均增加, 其中基因型“7922”和“掖107”为高磷条件下的 1.5 ～2.0 倍, 增加幅度高于基因型“178”和“*082”。 “7922”和“掖 107”的叶宽和鲜重在两个供磷水平下差异显著, “掖107”的叶片主叶脉直径和总叶片数差 异显著。低磷土壤条件下玉米叶宽和主叶脉直径变小, 鲜重和总叶片数减少。不同基因型玉米叶片色素和形 态变化差异显著。初步推测, “7922”和“掖 107”不耐低磷, “178”和“*082”较耐低磷。 低磷胁迫 玉米基因型 色素 苯丙氨酸解氨酶 总黄酮 叶片形态 : S513; S147.5 : A : 1671-3990(2009)01-0125-05 Effect of phosphorus stress on the pigment and morphology of different maize genotypes 1 2 1 1 1 1 CHEN Jun-Yi , CAI Yi-Lin , XU Li , YANG Zhi-Guo , GAN Xiao-Ling , PAN Ting-Ni (1.Chongqing Medical and Pharmaceutical College, Chongqing 400030, China; 2. Institute of Maize of Southwest University, Chongqing 400716, China) Abstract Four maize genotypes were selected to investigate the pigment and morphology of maize genotypes under low and high P dosage. The results show that the ratios of chlorophyll to carotenoid, purpurin and red pigment for four maize genotypes decrease under low P dose. Those of “7922” and “Ye107” are 0.4 ~ 0.8 times those under high P dose, with much higher decrease than in “178” and “*082”. PAL activity and total flav