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| Studies on Zinc Tolerance and Accumulation Characteristic of Pakchoi〔Brassica campestris L. ssp. chinensis（L.）Makino var. communis Tsen et Lee〕 |
| CHEN Xiu-ling, XU Yan-ru, CUI Xiu-min*, WU Xiao-bin |
| College of Resources and Environment, Shandong Agricultural University, Taian 271018, Shandong, China |
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Abstract Five genotypes pakchoi〔Brassica campestris L. ssp. chinensis（L.）Makino var.
communis Tsen et Lee〕including‘Suzhouqing’,‘Huangxinwu’,‘Piaoercai’,‘Kangre 605’
and‘Nannongaijiaohuang’were selected. The genotypic variations of Zn tolerance and Zn
accumulation were studied under 5 different zinc levels（0.43，100，200，400 and 800 mg·L
-1）by pot experiment with sand culture in solar greenhouse. The results indicated that
the shoot biomass of 5 varieties was slightly increased under different zinc levels. Only
the root growth of‘Kangre 605’was inhibited under the highest Zn solution, while the
roots of the other 4 genotypes were slightly affected. The root tolerance indexes of all
the genotypes ranged from 0.82 to 1.90. So they showed very high tolerance to Zn stress.
Comparatively, the tolerance of‘Kangre 605’was inferior. The Zn concentration and
accumulation in different organs were increased greatly with enhancement of Zn level. The
Zn content in roots was the highest. However, Zn accumulation in it was the lowest. More
than 60 % Zinc absorbed by roots was transferred to up ground. The redundant zinc absorbed
by‘Suzhouqing’,‘Huangxinwu’,‘Kangre 605’and‘Nannongaijiaohuang’was mostly stored
in petioles, and leaves were primary storing organ in‘Piaoercai’. Comparatively,
Suzhouqing’s ability for accumulating Zn is the strongest. While‘Nannongaijaohuang’is
the weakest, but it has very high translocation ability.
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Received: 11 February 2010
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Corresponding Authors:
CUI Xiu-min
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