| 苗期和灌浆期干旱-复水对高粱光合特性和物质生产的影响 |
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| 引用本文： | 张姣,吴奇,周宇飞,王艺陶,张瑞栋,黄瑞冬. 苗期和灌浆期干旱-复水对高粱光合特性和物质生产的影响[J]. 作物杂志, 2018, 34(3): 148-129. DOI: 10.16035/j.issn.1001-7283.2018.03.023 |
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| 作者姓名： | 张姣 吴奇 周宇飞 王艺陶 张瑞栋 黄瑞冬 |
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| 作者单位： | 1 高粱遗传与种质创新山西省重点实验室,030600,山西晋中2 沈阳农业大学农学院,110866,辽宁沈阳3 辽宁省农业环境保护监测站,110034,辽宁沈阳4 山西省农业科学院经济作物研究所,032200,山西汾阳 |
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| 基金项目： | 高粱遗传与种质创新山西省重点实验室开放课题(2015K-02);现代农业产业技术体系建设专项资金(CARS-06);国家科技支撑计划项目(2014BAD07B02);辽宁省教育厅一般项目(L2014271) |
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| 摘 要： | 本研究以高粱吉杂305和吉杂127为试验材料,研究苗期和灌浆期干旱-复水过程对高粱光合特性和物质生产的影响。结果表明,在苗期和灌浆期干旱胁迫下,2个高粱品种的光合作用受到了明显的抑制,其中净光合速率（Pn）、气孔导度（Gs）、胞间CO2浓度（Ci）、蒸腾速率（Tr）、最大光化学效率（Fv/Fm）、光化学淬灭系数（qP）、电子传递效率（ETR）和相对叶绿素含量（SPAD值）均出现了不同程度的下降,且吉杂305降幅低于吉杂127,而干旱使初始荧光（Fo）升高,且吉杂127升高幅度较大。2个时期干旱-复水后,吉杂305光合指标均有所恢复且与对照比较差异不显著,而吉杂127恢复程度有限,除苗期Pn、Ci,灌浆期Gs等指标外,其余光合指标与对照比较差异显著。经历2个时期干旱-复水导致高粱各器官的干物质量、单株子粒产量、单株生物产量和收获指数降低,吉杂127各产量指标的降幅均高于吉杂305,抗旱指数较低。
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| 关 键 词： | 干旱胁迫 高粱 光合特性 物质生产 |
| 收稿时间： | 2017-11-27 |
Effects of Drought and Rewatering at Seedling and Filling Stages on Photosynthetic Characteristics and Dry Matter Production of Sorghum |
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| Jiao Zhang,Qi Wu,Yufei Zhou,Yitao Wang,Ruidong Zhang,Ruidong Huang. Effects of Drought and Rewatering at Seedling and Filling Stages on Photosynthetic Characteristics and Dry Matter Production of Sorghum[J]. Crops, 2018, 34(3): 148-129. DOI: 10.16035/j.issn.1001-7283.2018.03.023 |
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| Authors: | Jiao Zhang Qi Wu Yufei Zhou Yitao Wang Ruidong Zhang Ruidong Huang |
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| Affiliation: | 1 Key Laboratory of Sorghum Genetics and Germplasm Enhancement of Shanxi Province, Jinzhong 030600, Shanxi, China2 College of Agronomy, Shenyang Agricultural University, Shenyang 110866, Liaoning, China3 Agro-environmental Protection and Supervision Center, Shenyang 110034, Liaoning, China4 Institute of Economic Crops, Shanxi Academy of Agricultural Sciences, Fenyang 032200, Shanxi, China |
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| Abstract: | Sorghum hybrids Jiza 305 and Jiza 127 were used as experimental materials to study the effects of drought and rewatering at seedling and filling stages on photosynthetic characteristics and dry matter production of sorghum. The results showed that the photosynthesis of two sorghum cultivars was inhibited under drought stress at the seedling and filling stages. The net photosynthetic rate (Pn), stomatal conductance (Gs), intercellular CO2 concentration (Ci), transpiration rate (Tr), maximum photochemistry (Fv/Fm), photochemical quenching coefficient (qP), electron transfer rate (ETR) and SPAD all decreased in different degrees, and the declined extent of above-mentioned parameters of Jiza 305 was lower than those of Jiza 127. However, under drought conditions, the initial fluorescence (Fo) of Jiza 127 increased higher than that of Jiza 305. After rewatering, the photosynthetic parameters of Jiza 305 were restored and no significant difference was observed between Jiza 305 and the control, the recovery of other parameters after rewatering in Jiza 127 was limited, except for Pn and Ci at the seedling stage and Gs at the filling stage, the other photosynthetic indexex were significant difference compaired with control. After two periods of drought and rewatering, the dry matter weight, grain yield, biomass yield and harvest index of sorghum organs decreased. The yield of Jiza 127 declined in a larger extent than that of Jiza 305. Jiza 127 showed a lower drought resistance index. |
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| Keywords: | Drought stress Sorghum Photosynthetic characteristics Dry matter production |
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