摘要以高产优质粳稻松粳9号和稻花香2号为试材, 利用中国北方FACE (free air CO2 enrichment)实验平台研究北方水稻生理代谢对CO2浓度增高的响应规律。在水稻抽穗期开始测定剑叶可溶性糖含量、蛋白质含量和总叶绿素含量, 收获后实测小区产量及产量构成因素, 比较处理间和品种间差异。结果表明, CO2浓度增高显著提高水稻抽穗期、乳熟期和完熟期剑叶可溶性糖含量, 松粳9号和稻花香2号最高增幅分别达11.7%和47.5%。CO2浓度增高显著降低抽穗期和完熟期剑叶可溶性蛋白含量, 松粳9号和稻花香2号最大降幅分别为16.2%和10.5%。CO2浓度增高使抽穗期和乳熟期剑叶总叶绿素含量显著增加, 松粳9号和稻花香2号最大增幅达18.9%和22.5%, 之后便逐渐降低。CO2浓度增高使松粳9号单株籽粒产量、生物学产量、经济系数分别提高6.82%、1.50%和12.64%, 稻花香2号平均升高2.56%、2.13%和26.05%。研究表明, CO2浓度增高最终提高了水稻植株生产力, 对可溶性物质含量的影响在不同生育期存在差异。这可能由于CO2浓度增高促进水稻生长发育, 导致水稻提早成熟, 叶片衰老促进了可溶性糖分解, 也加快了功能叶可溶性蛋白向籽粒运输速率。
关键词:FACE; 水稻; 生育后期; 可溶性糖; 可溶性蛋白质; 叶绿素; 植株生产力 Response of Soluble Substances Content in Flag Leaves during Late Growth Stage and Plant Productivity of Rice to Elevated CO2 in North China WANG Hui-Zhen1, ZHAO Hong-Liang1, FENG Yong-Xiang2, JIANG Le1, NING Da-Ke1, XIE Li-Yong1,*, LIN Er-Da3,* 1 College of Agronomy, Shenyang Agricultural University, Shenyang 110866, China
2 College of Agronomy, Heilongjiang Bayi Agricultural University, Daqing 163319, China
3 Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China
AbstractThe responses of high yield and good qualityjaponica varieties Songjing 9 and Daohuaxiang 2 to elevated CO2 concentration in North China were studied by using FACE experimental system. The soluble sugar content, soluble protein content and total chlorophyll content in flag leaves of rice were measured at late growth stage, rice yield per plot and yield components were measured at harvest stage. The results showed that elevated CO2 concentration increased soluble sugar content in flag leaf for Songjing 9 and Daohuaxiang 2 obviously during heading stage, milky stage and ripening stage, with the peak value of 11.7% and 47.5%, respectively. Elevated CO2 concentration obviously reduced soluble protein content in flag leaf during heading stage and ripening stage for Songjing 9 and Daohuaxiang 2, which was 16.2% and 10.5% in the largest reduction, respectively. Elevated CO2 concentration obviously increased total chlorophyll content in flag leaf for Songjing 9 and Daohuaxiang 2 from heading stage to milky stage, with the largest increase of 18.9% and 22.5%, and then decreased after milk stage. Elevated CO2 concentration increased seed yield of individual plant, total biomass and economic coefficient with an average of 6.82%, 1.50%, 12.64% for Songjing 9, and 2.56%, 2.13%, 26.05% for Daohuaxiang 2. The results indicated that elevated atmospheric CO2 concentration increases rice plant productivity, but with diffrence effects on soluble sugar, soluble protein and chlorophyll in flag leaf of different rice varieties at different growth stages. The reason is likely that elevated atmospheric CO2 concentration promotes rice growth and development, leading to a early maturity, then senescent leaf promotes soluble sugar’s decomposition, and speeds up transportation of soluble protein from function leaf to seeds.
Keyword:FACE; Rice; Late growth stage; Soluble sugar; Soluble protein; Chlorophyll; Plant productivity Show Figures Show Figures
ns、*和**代表不同处理间差异不显著、0.05和0.01水平上差异显著。FACE: 开放式空气CO2浓度增加; Ambient: 正常大气CO2浓度。FILM: 对土壤做覆膜处理; N: 土壤正常状况。 ns, *, and ** indicate no significant difference, significant differences at 0.05, and 0.01 probability levels among treatments, respectively. FACE: free air CO2 enrichment. FILM: plastic-film mulching; N: natural soil.
表1 FACE及覆膜处理对水稻生育后期剑叶可溶性糖含量的影响 Table 1 Effects of FACE and mulching on soluble sugar content in rice flag leaf during late growth stage
表2 FACE及覆膜处理对水稻生育后期剑叶可溶性蛋白含量的影响 Table 2 Effects of FACE and mulching on soluble protein content in rice flag leaf during late growth stage
品种 Variety
主处理 Main treatment
副处理 Secondary treatment
可溶性蛋白含量(平均值±标准误) Soluble protein content (mean± SD) (mg g-1 FW)
孕穗期 Booting stage
抽穗期 Heading stage
乳熟期 Milky stage
蜡熟期 Dough stage
完熟期 Ripe stage
松粳9号 Songjing 9
FACE
FILM
87.11±1.48
56.19±0.03
53.76±0.59
39.72±2.62
27.37±0.13
N
77.46±0.20
52.84±0.87
43.59±0.18
26.75±0.80
15.43±0.08
Ambient
FILM
88.35±0.29
70.26±1.27
55.71±0.31
40.39±0.08
27.55±0.18
N
85.78±2.07
53.44±0.71
51.92±0.23
32.71±0.80
22.59±0.12
差异显著性Significance
CO2
**
**
**
*
**
FILM
**
**
**
**
**
FILM×CO2
*
**
**
ns
**
稻花香2号 Daohuaxiang 2
FACE
FILM
80.58±0.95
52.67±0.18
46.70±2.18
36.11±0.97
25.22±0.51
N
65.98±2.24
46.52±0.62
39.62±0.18
25.75±1.13
23.41±0.05
Ambient
FILM
80.75±1.61
61.78±0.10
49.30±0.21
39.59±0.23
29.86±0.35
N
76.90±2.15
49.67±1.18
41.11±0.18
28.86±0.58
23.79±0.02
差异显著性Significance
CO2
*
**
ns
**
**
FILM
**
**
**
**
**
FILM×CO2
*
**
ns
ns
**
ns、*和**代表不同处理间差异不显著、0.05和0.01水平上差异显著。缩写注解同表1。 ns, *, and ** indicate no significant difference, significant differences at 0.05, and 0.01 probability levels among treatments, respectively. The annotations of abbreviation in this table are the same as those given in Table 1.
表2 FACE及覆膜处理对水稻生育后期剑叶可溶性蛋白含量的影响 Table 2 Effects of FACE and mulching on soluble protein content in rice flag leaf during late growth stage
ns、*和**代表不同处理间差异不显著、0.05和0.01水平上差异显著。缩写注解同表1。 ns, *, and ** indicate no significant difference, significant differences at 0.05, and 0.01 probability levels among treatments, respectively. The annotations of abbreviation in this table are the same as those given in Table 1.
表3 FACE及覆膜处理对水稻生育后期剑叶总叶绿素含量的影响 Table 3 Effects of FACE and mulching on chlorophyll content in rice flag leaf during late growth stage
图2 FACE及覆膜处理对水稻生物学产量的影响FACE: 开放式空气CO2浓度增加; AMB: 正常大气CO2浓度; FILM: 对土壤做覆地膜处理; N: 土壤正常状况; Songjing 9: 松粳9号; Daohuaxiang 2: 稻花香2号。Fig. 2 Effects of FACE and mulching on total biomass of riceFACE: free air CO2 enrichment; AMB: ambient CO2; FILM: plastic-film mulching; N: natural soil.
图3 FACE及覆膜处理对水稻经济系数的影响 Fig. 3 Effects of FACE and mulching on economic coefficient of riceFACE: 开放式空气CO2浓度增加; AMB: 正常大气CO2浓度; FILM: 对土壤做覆地膜处理; N: 土壤正常状况; Songjing 9: 松粳9号; Daohuaxiang 2: 稻花香2号。
FACE: free air CO2 enrichment; AMB: ambient CO2; FILM: plastic-film mulching; N: natural soil.
FACE与覆膜处理对经济系数交互作用的影响FACE: 开放式空气CO2浓度增加; AMB: 正常大气CO2浓度; FILM: 对土壤做覆地膜处理; N: 土壤正常状况; Songjing 9: 松粳9号; Daohuaxiang 2: 稻花香2号。Fig. 4 Interaction effects of FACE and FILM on economic coefficient of different varietiesFACE: free air CO2 enrichment; AMB: ambient CO2; FILM: plastic-film mulching; N: natural soil.
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