|Table of Contents|

Effects of Elevated Atmospheric CO2 Concentration on Seeds Vitality of Main Crop in Northeast China(PDF)

《大豆科学》[ISSN:1000-9841/CN:23-1227/S]

Issue:
2021年03期
Page:
379-384
Research Field:
Publishing date:

Info

Title:
Effects of Elevated Atmospheric CO2 Concentration on Seeds Vitality of Main Crop in Northeast China
Author(s):
YAO Ting1;  LONG Jie-qi1;  HAN Xiao-zeng2;  MIAO Shu-jie1;  QIAO Yun-fa1*
（1.School of Applied Meteorology, Nanjing University of Information Science & Technology, Nanjing 210044, China; 2.Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China）
Keywords:
Carbon dioxide; Soybean; Maize; Rice; Seed vigor
PACS:
-
DOI:
10.11861/j.issn.1000-9841.2021.03.0379
Abstract:
Elevated atmospheric CO2 concentration is one of the important characteristics of global climate change. In order to reveal the impact of future climate change on the vitality of crop seeds, a germination experiment was carried out to study the adaptive response of seeds to elevated CO2. In 2019, an open top chamber (OTC)was set up to simulate CO2 enrichment at Hailun Agroecological Experimental Station, Chinese Academy of Sciences. Three major crop including soybean, maize and rice of Northeast China were selected as test material. Two CO2 treatments were aCO2 (ambient CO2, 400 μmol?mol-1) and eCO2 (elevated CO2, 700 μmol?mol-1). The results showed that eCO2 decreased seed volume, 100-seed weight, 24 h-imbibition speed, electrical conductivity rate of seeds soaking solution, germination rate, germination potential and germination index in soybean seeds decreased by 11.24%, 10.53%, 2.51%, 27.72%, 15.85%, 19.75% and 10.17% compared to aCO2, respectively. Although CO2 enrichment did not significantly influence the 100-seed weight of maize, the 24 h-imbibition speed and electrical conductivity rate of seeds soaking solution in maize seeds at eCO2 decreased by 3.69% and 8.62%, respectively. The germination rate, germination potential, germination index and vigor index of rice seeds at eCO2 increased by 81.03%, 75.00%, 56.14% and 81.68% compared to aCO2, respectively. The volume of rice seeds decreased by 21.35%, while the 1000-seed weight, germination potential, germination index and vigor index increased by 5.62%, 5.19%, 26.11% and 32.21%, respectively. All these indicated that the responses of various crop seeds to elevated atmospheric CO2 were different. Totally, at 700 μmol?mol-1 CO2 concentration, the seed vitality was maize>rice>soybean.

References:

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Last Update: 2021-07-20