植物生态学报 ›› 2005, Vol. 29 ›› Issue (6): 992-999.DOI: 10.17521/cjpe.2005.0134
收稿日期:
2004-03-11
接受日期:
2004-08-06
出版日期:
2005-03-11
发布日期:
2005-09-30
通讯作者:
杨中艺
作者简介:
*E-mail:adsyzy@zsu.edu.cn基金资助:
DAI Quan-Lin1, YUAN Jian-Gang1, FANG Wei2, YANG Zhong-Yi1,*()
Received:
2004-03-11
Accepted:
2004-08-06
Online:
2005-03-11
Published:
2005-09-30
Contact:
YANG Zhong-Yi
摘要:
为了研究不同玉米(Zea mays)品种及不同器官对Pb积累能力的差异,在土壤Pb含量为595.55 mg·kg-1 的高Pb胁迫和含量为195.55 mg·kg-1的低Pb胁迫(对照)条件下,采用盆栽试验结合火焰原子吸收等方法,测定了25个玉米品种各器官Pb的含量。结果表明:Pb胁迫下供试玉米品种各器官含Pb量表现为根>茎≌叶>籽实;与对照相比,根、茎、叶Pb含量均大幅度提高,籽实含量的提高幅度相对较小;Pb胁迫条件下,有近半数的供试玉米品种的籽实Pb含量超过了国家规定的卫生标准,显示了在受重金属污染农田生产的玉米产品存在着较高的受Pb污染的风险。有22个品种平均籽实生物量在较强Pb胁迫下有所下降,降幅为0.9%~38.7%,但平均降幅仅为12.6%,显示玉米在Pb胁迫下的减产不易察觉,从而增加了在受污染农田中玉米产品受Pb污染的风险。但研究也表明,在较高Pb胁迫下尚有52%的品种籽实Pb含量未超过国家卫生标准最高限量值,因此可以利用这些品种在受Pb污染农田中进行玉米生产,以降低Pb经玉米产品进入人类食物链的风险。研究结果还发现供试玉米品种各营养器官间Pb含量均呈极显著正相关,但营养器官与籽实Pb含量间无显著相关。其中在较强的胁迫条件下营养器官Pb含量特别高的品种No.1的籽实中Pb含量(0.19 mg·kg-1)比较低,未超过国家卫生标准;品种No.2、No.3和品种No.6也有类似的特点。除上述品种以及品种No.4外,其余品种籽实Pb含量遵循与营养器官Pb含量成正比的一般规律。根中Pb含量特别高的品种No.1,籽实产量在Pb胁迫下略有下降,但下降幅度最小。胁迫条件下,品种No.1的营养器官Pb总量最高(51.69 mg·plant-1),是对照的近12倍;籽实Pb含量符合国家标准的品种No.2,No.3和No.6的营养器官Pb总量也较高,在36~42 mg·plant-1之间。由此可见,存在着在受Pb污染农田利用这些品种进行玉米生产同时修复受污染土壤的可能。
代全林, 袁剑刚, 方炜, 杨中艺. 玉米各器官积累Pb能力的品种间差异. 植物生态学报, 2005, 29(6): 992-999. DOI: 10.17521/cjpe.2005.0134
DAI Quan-Lin, YUAN Jian-Gang, FANG Wei, YANG Zhong-Yi. DIFFERENCES OF Pb ACCUMULATION AMONG PLANT TISSUES OF 25 ZEA MAYS VARIETIES. Chinese Journal of Plant Ecology, 2005, 29(6): 992-999. DOI: 10.17521/cjpe.2005.0134
品种 Varieties | 根 Root | 茎 Stem | 叶 Leaf | 籽实 Grain | ||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Pb胁迫 Pb stress | 对照 Control | Pb胁迫 Pb stress | 对照 Control | Pb胁迫 Pb stress | 对照 Control | Pb胁迫 Pb stress | 对照 Control | |||||||||||
No.1 | 427.68a | 34.57ef | 109.27a | 8.09ghi | 93.57b | 9.50cdefgh | 0.19efghi | 0.10def | ||||||||||
No.2 | 325.77b | 38.79de | 86.35c | 13.50b | 88.37c | 12.79abc | 0.19efghi | 0.11cdef | ||||||||||
No.3 | 306.81c | 41.16cd | 85.37c | 11.52bcde | 80.65d | 8.62defghi | 0.17ghi | 0.11cdef | ||||||||||
No.4 | 302.82c | 32.24fghi | 100.24b | 10.95bcdef | 92.52bc | 13.58ab | 0.21defghi* | 0.12cdef | ||||||||||
No.5 | 300.25c | 47.12b | 108.48a | 12.68bc | 125.22a | 12.61abcd | 0.60a* | 0.11cdef | ||||||||||
No.6 | 289.92d | 28.64ghij | 99.65b | 10.23cdefg | 95.64b | 8.65defghi | 0.18efghi | 0.11cdef | ||||||||||
No.7 | 239.81e | 35.40ef | 74.06d | 7.56ghi | 65.27e | 5.62hij | 0.26cde* | 0.18abc | ||||||||||
No.8 | 236.97e | 26.53j | 88.60c | 12.55bc | 56.06gh | 10.37bcdef | 0.29cd* | 0.21a* | ||||||||||
No.9 | 232.66e | 43.90bc | 65.19efg | 19.68a | 48.95ij | 16.20a | 0.49b* | 0.07ef | ||||||||||
No.10 | 218.49f | 25.67j | 53.30h | 7.20hi | 48.05ij | 9.78bcdef | 0.47b* | 0.13bcdef | ||||||||||
No.11 | 211.80f | 32.77fgh | 68.61e | 6.66i | 62.09ef | 8.38efghi | 0.19efghi | 0.15abcd | ||||||||||
No.12 | 193.91g | 28.60ghij | 62.09g | 11.69bcd | 55.67gh | 10.09bcdef | 0.26cdef* | 0.14abcde | ||||||||||
No.13 | 189.65gh | 44.34bc | 74.09d | 8.65fghi | 48.64ij | 7.00fghi | 0.17ghi | 0.11cdef | ||||||||||
No.14 | 186.06gh | 20.33k | 63.41fg | 6.53i | 35.18l | 5.69ghij | 0.19efghi | 0.09def | ||||||||||
No.15 | 184.64h | 12.29lm | 25.19l | 2.31j | 29.35m | 2.59j | 0.32c* | 0.20ab | ||||||||||
No.16 | 163.54i | 36.40ef | 45.06i | 8.86efghi | 38.88kl | 8.14efghi | 0.25cdefg* | 0.10def | ||||||||||
No.17 | 159.67ij | 28.25hij | 56.26h | 9.06defghi | 41.03k | 8.14efghi | 0.15i | 0.10def | ||||||||||
No.18 | 159.31ij | 25.08j | 56.37h | 11.06bcdef | 48.19ij | 8.69defghi | 0.24cdefgh* | 0.09def | ||||||||||
No.19 | 156.76ijk | 56.25a | 40.26j | 6.38i | 46.36j | 9.67bcdefg | 0.19efghi | 0.11cdef | ||||||||||
No.20 | 154.25jk | 15.85kl | 32.69k | 9.37defgh | 48.62ij | 5.37ij | 0.20efghi | 0.12cdef | ||||||||||
No.21 | 150.06kl | 10.29m | 34.60k | 6.56i | 52.19hi | 5.10ij | 0.17fghi | 0.06f | ||||||||||
No.22 | 144.22l | 28.16ij | 57.28h | 7.63ghi | 59.58fg | 8.25efghi | 0.16hi | 0.10def | ||||||||||
No.23 | 120.27mn | 33.04fg | 43.40ij | 9.68defgh | 48.58ij | 8.76defghi | 0.22defghi* | 0.12cdef | ||||||||||
No.24 | 113.23n | 27.51j | 66.99ef | 12.96b | 63.18ef | 11.09bcde | 0.21defghi* | 0.12bcdef | ||||||||||
No.25 | 84.17o | 34.40ef | 65.39efg | 8.63fghi | 80.13d | 7.21efghi | 0.15i | 0.09def | ||||||||||
平均 Mean | 210.11 | 31.50 | 66.49 | 9.60 | 62.08 | 8.88 | 0.24 | 0.12 | ||||||||||
C.V. | 37.8 | 33.8 | 35.3 | 34.8 | 37.1 | 33.4 | 46.9 | 29.4 |
表1 供试玉米品种各器官的Pb含量(mg·kg-1)
Table 1 Pb concentrations in root, stem, leaf and grain of the tested Zea mays varieties
品种 Varieties | 根 Root | 茎 Stem | 叶 Leaf | 籽实 Grain | ||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Pb胁迫 Pb stress | 对照 Control | Pb胁迫 Pb stress | 对照 Control | Pb胁迫 Pb stress | 对照 Control | Pb胁迫 Pb stress | 对照 Control | |||||||||||
No.1 | 427.68a | 34.57ef | 109.27a | 8.09ghi | 93.57b | 9.50cdefgh | 0.19efghi | 0.10def | ||||||||||
No.2 | 325.77b | 38.79de | 86.35c | 13.50b | 88.37c | 12.79abc | 0.19efghi | 0.11cdef | ||||||||||
No.3 | 306.81c | 41.16cd | 85.37c | 11.52bcde | 80.65d | 8.62defghi | 0.17ghi | 0.11cdef | ||||||||||
No.4 | 302.82c | 32.24fghi | 100.24b | 10.95bcdef | 92.52bc | 13.58ab | 0.21defghi* | 0.12cdef | ||||||||||
No.5 | 300.25c | 47.12b | 108.48a | 12.68bc | 125.22a | 12.61abcd | 0.60a* | 0.11cdef | ||||||||||
No.6 | 289.92d | 28.64ghij | 99.65b | 10.23cdefg | 95.64b | 8.65defghi | 0.18efghi | 0.11cdef | ||||||||||
No.7 | 239.81e | 35.40ef | 74.06d | 7.56ghi | 65.27e | 5.62hij | 0.26cde* | 0.18abc | ||||||||||
No.8 | 236.97e | 26.53j | 88.60c | 12.55bc | 56.06gh | 10.37bcdef | 0.29cd* | 0.21a* | ||||||||||
No.9 | 232.66e | 43.90bc | 65.19efg | 19.68a | 48.95ij | 16.20a | 0.49b* | 0.07ef | ||||||||||
No.10 | 218.49f | 25.67j | 53.30h | 7.20hi | 48.05ij | 9.78bcdef | 0.47b* | 0.13bcdef | ||||||||||
No.11 | 211.80f | 32.77fgh | 68.61e | 6.66i | 62.09ef | 8.38efghi | 0.19efghi | 0.15abcd | ||||||||||
No.12 | 193.91g | 28.60ghij | 62.09g | 11.69bcd | 55.67gh | 10.09bcdef | 0.26cdef* | 0.14abcde | ||||||||||
No.13 | 189.65gh | 44.34bc | 74.09d | 8.65fghi | 48.64ij | 7.00fghi | 0.17ghi | 0.11cdef | ||||||||||
No.14 | 186.06gh | 20.33k | 63.41fg | 6.53i | 35.18l | 5.69ghij | 0.19efghi | 0.09def | ||||||||||
No.15 | 184.64h | 12.29lm | 25.19l | 2.31j | 29.35m | 2.59j | 0.32c* | 0.20ab | ||||||||||
No.16 | 163.54i | 36.40ef | 45.06i | 8.86efghi | 38.88kl | 8.14efghi | 0.25cdefg* | 0.10def | ||||||||||
No.17 | 159.67ij | 28.25hij | 56.26h | 9.06defghi | 41.03k | 8.14efghi | 0.15i | 0.10def | ||||||||||
No.18 | 159.31ij | 25.08j | 56.37h | 11.06bcdef | 48.19ij | 8.69defghi | 0.24cdefgh* | 0.09def | ||||||||||
No.19 | 156.76ijk | 56.25a | 40.26j | 6.38i | 46.36j | 9.67bcdefg | 0.19efghi | 0.11cdef | ||||||||||
No.20 | 154.25jk | 15.85kl | 32.69k | 9.37defgh | 48.62ij | 5.37ij | 0.20efghi | 0.12cdef | ||||||||||
No.21 | 150.06kl | 10.29m | 34.60k | 6.56i | 52.19hi | 5.10ij | 0.17fghi | 0.06f | ||||||||||
No.22 | 144.22l | 28.16ij | 57.28h | 7.63ghi | 59.58fg | 8.25efghi | 0.16hi | 0.10def | ||||||||||
No.23 | 120.27mn | 33.04fg | 43.40ij | 9.68defgh | 48.58ij | 8.76defghi | 0.22defghi* | 0.12cdef | ||||||||||
No.24 | 113.23n | 27.51j | 66.99ef | 12.96b | 63.18ef | 11.09bcde | 0.21defghi* | 0.12bcdef | ||||||||||
No.25 | 84.17o | 34.40ef | 65.39efg | 8.63fghi | 80.13d | 7.21efghi | 0.15i | 0.09def | ||||||||||
平均 Mean | 210.11 | 31.50 | 66.49 | 9.60 | 62.08 | 8.88 | 0.24 | 0.12 | ||||||||||
C.V. | 37.8 | 33.8 | 35.3 | 34.8 | 37.1 | 33.4 | 46.9 | 29.4 |
器官 Organs | Pb胁迫 Pb stress | 对照 Control | ||||
---|---|---|---|---|---|---|
茎 Stem | 叶 Leaf | 籽实 Grain | 茎 Stem | 叶 Leaf | 籽实 Grain | |
根Root | 0.775** | 0.644** | 0.211 | 0.382** | 0.564** | -0.159 |
茎Stem | - | 0.834** | 0.130 | - | 0.496** | -0.227 |
叶Leaf | - | 0.171 | - | -0.274 |
表2 不同胁迫条件下玉米品种各器官间Pb含量的相关系数
Table 2 Correlation coefficients between Pb contents of different organs under Pb stress and control
器官 Organs | Pb胁迫 Pb stress | 对照 Control | ||||
---|---|---|---|---|---|---|
茎 Stem | 叶 Leaf | 籽实 Grain | 茎 Stem | 叶 Leaf | 籽实 Grain | |
根Root | 0.775** | 0.644** | 0.211 | 0.382** | 0.564** | -0.159 |
茎Stem | - | 0.834** | 0.130 | - | 0.496** | -0.227 |
叶Leaf | - | 0.171 | - | -0.274 |
品种 Varieties | 籽实产量 Grain biomass (g·plant-1) | 营养器官Pb总量 Total Pb in the vegetative organs (mg·plant-1) | ||||
---|---|---|---|---|---|---|
Pb胁迫 Pb stress | 对照 Control | 增减 Increment (%) | Pb胁迫 Pb stress | 对照 Control | 增减 Increment (%) | |
No.1 | 115ab | 116cde | -0.9 | 51.69a | 4.37bcdef | 10.8 |
No.2 | 120a | 115cde | 4.3 | 41.93b | 5.05b | 7.3 |
No.3 | 116ab | 116cde | 0.0 | 39.13c | 5.17b | 6.6 |
No.4 | 109bc | 176a | -38.1 | 41.36b | 4.41bcdef | 8.4 |
No.5 | 81hi | 86i | -5.8 | 33.88e | 4.86bc | 6.0 |
No.6 | 121a | 118cde | 2.5 | 36.65d | 3.62fg | 9.1 |
No.7 | 88fghi | 110ef | -20.0 | 25.82f | 3.73efg | 5.9 |
No.8 | 95def | 104fg | -8.7 | 26.61f | 4.06cdefg | 5.6 |
No.9 | 94ef | 96ghi | -2.1 | 24.55fg | 6.45a | 2.8 |
No.10 | 92efg | 122def | -24.6 | 22.78gh | 3.36g | 5.8 |
No.11 | 100cde | 108ef | -7.4 | 25.46f | 3.74efg | 5.8 |
No.12 | 105cd | 124bc | -15.3 | 20.23ij | 3.64fg | 4.6 |
No.13 | 97def | 111ef | -12.6 | 21.48hi | 4.57bcd | 3.7 |
No.14 | 83ghi | 89hi | -6.7 | 18.65jk | 2.45h | 6.6 |
No.15 | 90fgh | 108ef | -16.7 | 15.16mn | 1.22i | 11.4 |
No.16 | 120a | 132b | -9.1 | 19.38jk | 4.50bcde | 3.3 |
No.17 | 91efg | 108ef | -15.7 | 18.82jk | 3.52g | 4.3 |
No.18 | 92efg | 111ef | -17.1 | 18.18jkl | 3.47g | 4.2 |
No.19 | 88fghi | 96ghi | -8.3 | 14.99mn | 4.81bc | 2.1 |
No.20 | 104cd | 115cde | -9.6 | 18.83jk | 2.37h | 6.9 |
No.21 | 80i | 104fg | -23.1 | 14.06n | 0.79i | 16.8 |
No.22 | 81hi | 86i | -5.8 | 18.17jkl | 3.47g | 4.2 |
No.23 | 81hi | 112def | -27.7 | 13.75n | 3.90defg | 2.5 |
No.24 | 95def | 97gh | -2.1 | 17.90kl | 4.15cdefg | 3.3 |
No.25 | 93ef | 125bc | -25.6 | 16.35lm | 4.43bcdef | 2.7 |
平均Mean | 97 | 111 | -12.6 | 24.63 | 3.84 | 6.0 |
C.V. | 13.5 | 16.2 | 88.5 | 41.7 | 31.4 | 55.3 |
表3 供试玉米品种籽实产量及营养器官的Pb总量
Table 3 Grain biomass and total Pb in the vegetative organs of the tested Zea mays varieties
品种 Varieties | 籽实产量 Grain biomass (g·plant-1) | 营养器官Pb总量 Total Pb in the vegetative organs (mg·plant-1) | ||||
---|---|---|---|---|---|---|
Pb胁迫 Pb stress | 对照 Control | 增减 Increment (%) | Pb胁迫 Pb stress | 对照 Control | 增减 Increment (%) | |
No.1 | 115ab | 116cde | -0.9 | 51.69a | 4.37bcdef | 10.8 |
No.2 | 120a | 115cde | 4.3 | 41.93b | 5.05b | 7.3 |
No.3 | 116ab | 116cde | 0.0 | 39.13c | 5.17b | 6.6 |
No.4 | 109bc | 176a | -38.1 | 41.36b | 4.41bcdef | 8.4 |
No.5 | 81hi | 86i | -5.8 | 33.88e | 4.86bc | 6.0 |
No.6 | 121a | 118cde | 2.5 | 36.65d | 3.62fg | 9.1 |
No.7 | 88fghi | 110ef | -20.0 | 25.82f | 3.73efg | 5.9 |
No.8 | 95def | 104fg | -8.7 | 26.61f | 4.06cdefg | 5.6 |
No.9 | 94ef | 96ghi | -2.1 | 24.55fg | 6.45a | 2.8 |
No.10 | 92efg | 122def | -24.6 | 22.78gh | 3.36g | 5.8 |
No.11 | 100cde | 108ef | -7.4 | 25.46f | 3.74efg | 5.8 |
No.12 | 105cd | 124bc | -15.3 | 20.23ij | 3.64fg | 4.6 |
No.13 | 97def | 111ef | -12.6 | 21.48hi | 4.57bcd | 3.7 |
No.14 | 83ghi | 89hi | -6.7 | 18.65jk | 2.45h | 6.6 |
No.15 | 90fgh | 108ef | -16.7 | 15.16mn | 1.22i | 11.4 |
No.16 | 120a | 132b | -9.1 | 19.38jk | 4.50bcde | 3.3 |
No.17 | 91efg | 108ef | -15.7 | 18.82jk | 3.52g | 4.3 |
No.18 | 92efg | 111ef | -17.1 | 18.18jkl | 3.47g | 4.2 |
No.19 | 88fghi | 96ghi | -8.3 | 14.99mn | 4.81bc | 2.1 |
No.20 | 104cd | 115cde | -9.6 | 18.83jk | 2.37h | 6.9 |
No.21 | 80i | 104fg | -23.1 | 14.06n | 0.79i | 16.8 |
No.22 | 81hi | 86i | -5.8 | 18.17jkl | 3.47g | 4.2 |
No.23 | 81hi | 112def | -27.7 | 13.75n | 3.90defg | 2.5 |
No.24 | 95def | 97gh | -2.1 | 17.90kl | 4.15cdefg | 3.3 |
No.25 | 93ef | 125bc | -25.6 | 16.35lm | 4.43bcdef | 2.7 |
平均Mean | 97 | 111 | -12.6 | 24.63 | 3.84 | 6.0 |
C.V. | 13.5 | 16.2 | 88.5 | 41.7 | 31.4 | 55.3 |
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