COMPARATIVE STUDY OF SIX MAIZE (ZEA MAYS L.) CULTIVARS CONCERNING CADMIUM UPTAKE, PARTITIONING AND TOLERANCE
COMPARATIVE STUDY OF SIX MAIZE (ZEA MAYS L.) CULTIVARS CONCERNING CADMIUM UPTAKE, PARTITIONING AND TOLERANCE
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DOI：
10.15666/aeer/1903_23052331
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发表时间：
2021-01-01
影响因子：
0.7
通讯作者：
Deng, J. M.
中科院分区：
文献类型：
--
作者：
Akram, M. A.;Wahid, A.;Deng, J. M.
本试验研究了6个玉米品种对Cd的积累、分配、转运及其对玉米生长和生化特性的影响，筛选出耐Cd玉米品种。结果表明，在高镉水平下，生长和生化指标以及耐镉指数均显著下降。此外，品种和镉处理对生长和生化性状的影响均达到显著水平。不同品种和不同Cd处理对水稻不同组织中Cd、Ca、K、P的吸收有显著影响。转运，生物富集和生物积累的因素被发现不显着的品种和镉处理。植株生长与生化性状呈显著正相关，植株全量Cd、Ca、K、P与植株干重、鲜重、株高呈显著负相关。此外，PC 1的生长性状，Ca，K和P的负载，而PC 2的镉在不同的植物组织。因此，在PC 1和PC 2参数之间观察到强负相关。不同玉米品种根中Cd积累量最大，而冠部和叶中Cd积累量最小。EV-1098对Cd胁迫的耐性强于其它品种。
This experiment was conducted to determine Cd accumulation, partitioning, translocation and their ultimate consequences on growth and biochemical traits of six maize cultivars to screen out Cd tolerant one. A significant decrease in growth and biochemical traits as well as in Cd tolerance index was found, especially at higher Cd level. Moreover, the varieties and Cd treatments were found significant for the growth and biochemical traits. Uptake of Cd, Ca, K and P in the different plant tissues were significantly affected by the varieties and Cd treatments. Translocation, bioconcentration and bioaccumulation factors were found non-significant for varieties and Cd treatments. A significant positive correlation was found between growth and biochemical traits while, among plant total Cd, Ca, K and P, total plant dry; and fresh weight and plant height were significantly negative. Furthermore, the PC1 was loaded by growth traits; Ca, K and P while PC2 by the Cd in different plant tissues. Hence, a strong negative correlation was observed between the PC1 and PC2 parameters. The maximum Cd accumulation was in the roots rather than the crown and leaf tissues of maize cultivars. The EV-1098 was to be more tolerant to Cd stress than other cultivars.