Association of carbon isotope discrimination with leaf gas exchange and water use efficiency in maize following soil amendment with superabsorbent hydrogel
The correlation of carbon isotope discrimination (△13C) with photosynthetic gas exchange and water use efficiency (WUE) in maize was investigated under low rainfall conditions with or without superabsorbent polymer (SAP). SAP (45 kg/ha) was mixed into the top 10 cm soil layer at sowing in lysimeters...
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| Format: | Article |
| Language: | English |
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Czech Academy of Agricultural Sciences
2018-10-01
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| Series: | Plant, Soil and Environment |
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| Online Access: | https://pse.agriculturejournals.cz/artkey/pse-201810-0004_association-of-carbon-isotope-discrimination-with-leaf-gas-exchange-and-water-use-efficiency-in-maize-following.php |
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| author | Wei YANG Pin-Fang LI |
| author_facet | Wei YANG Pin-Fang LI |
| author_sort | Wei YANG |
| collection | DOAJ |
| description | The correlation of carbon isotope discrimination (△13C) with photosynthetic gas exchange and water use efficiency (WUE) in maize was investigated under low rainfall conditions with or without superabsorbent polymer (SAP). SAP (45 kg/ha) was mixed into the top 10 cm soil layer at sowing in lysimeters. Compared with the control plants not treated with SAP, the application of SAP increased net photosynthesis rate; stomatal conductance (gs); transpiration rate; chlorophyll content (Chl) and intrinsic water use efficiency at leaf level (WUEi), but decreased intercellular CO2 concentration (Ci) and leaf △13C. In plants supplied with SAP, leaf △13C was positively correlated with Ci (r = 0.864, P < 0.01) and negatively correlated with gs and WUEi (r = -0.860 and -0.626, P < 0.01, respectively). Leaf △13C was not correlated with Chl with or without SAP. Grain △13C significantly decreased by 12.4% and showed a significant negative correlation with grain WUE under SAP treatments (r = -0.670, P < 0.05). These results suggest that in the presence of SAP, maize leaf and grain △13C could be good indicators for evaluating maize WUE during periods of low rainfall. |
| first_indexed | 2024-04-10T08:08:58Z |
| format | Article |
| id | doaj.art-d2abc8c19a98424798ed57241dd1eda8 |
| institution | Directory Open Access Journal |
| issn | 1214-1178 1805-9368 |
| language | English |
| last_indexed | 2024-04-10T08:08:58Z |
| publishDate | 2018-10-01 |
| publisher | Czech Academy of Agricultural Sciences |
| record_format | Article |
| series | Plant, Soil and Environment |
| spelling | doaj.art-d2abc8c19a98424798ed57241dd1eda82023-02-23T03:46:39ZengCzech Academy of Agricultural SciencesPlant, Soil and Environment1214-11781805-93682018-10-01641048449010.17221/463/2018-PSEpse-201810-0004Association of carbon isotope discrimination with leaf gas exchange and water use efficiency in maize following soil amendment with superabsorbent hydrogelWei YANG0Pin-Fang LI1College of Resources and Environmental Sciences, China Agricultural University, Beijing, P.R. ChinaCollege of Resources and Environmental Sciences, China Agricultural University, Beijing, P.R. ChinaThe correlation of carbon isotope discrimination (△13C) with photosynthetic gas exchange and water use efficiency (WUE) in maize was investigated under low rainfall conditions with or without superabsorbent polymer (SAP). SAP (45 kg/ha) was mixed into the top 10 cm soil layer at sowing in lysimeters. Compared with the control plants not treated with SAP, the application of SAP increased net photosynthesis rate; stomatal conductance (gs); transpiration rate; chlorophyll content (Chl) and intrinsic water use efficiency at leaf level (WUEi), but decreased intercellular CO2 concentration (Ci) and leaf △13C. In plants supplied with SAP, leaf △13C was positively correlated with Ci (r = 0.864, P < 0.01) and negatively correlated with gs and WUEi (r = -0.860 and -0.626, P < 0.01, respectively). Leaf △13C was not correlated with Chl with or without SAP. Grain △13C significantly decreased by 12.4% and showed a significant negative correlation with grain WUE under SAP treatments (r = -0.670, P < 0.05). These results suggest that in the presence of SAP, maize leaf and grain △13C could be good indicators for evaluating maize WUE during periods of low rainfall.https://pse.agriculturejournals.cz/artkey/pse-201810-0004_association-of-carbon-isotope-discrimination-with-leaf-gas-exchange-and-water-use-efficiency-in-maize-following.phpwater-saving polymerzea mays l.physiological traitssoil moisturecarbon isotope composition |
| spellingShingle | Wei YANG Pin-Fang LI Association of carbon isotope discrimination with leaf gas exchange and water use efficiency in maize following soil amendment with superabsorbent hydrogel Plant, Soil and Environment water-saving polymer zea mays l. physiological traits soil moisture carbon isotope composition |
| title | Association of carbon isotope discrimination with leaf gas exchange and water use efficiency in maize following soil amendment with superabsorbent hydrogel |
| title_full | Association of carbon isotope discrimination with leaf gas exchange and water use efficiency in maize following soil amendment with superabsorbent hydrogel |
| title_fullStr | Association of carbon isotope discrimination with leaf gas exchange and water use efficiency in maize following soil amendment with superabsorbent hydrogel |
| title_full_unstemmed | Association of carbon isotope discrimination with leaf gas exchange and water use efficiency in maize following soil amendment with superabsorbent hydrogel |
| title_short | Association of carbon isotope discrimination with leaf gas exchange and water use efficiency in maize following soil amendment with superabsorbent hydrogel |
| title_sort | association of carbon isotope discrimination with leaf gas exchange and water use efficiency in maize following soil amendment with superabsorbent hydrogel |
| topic | water-saving polymer zea mays l. physiological traits soil moisture carbon isotope composition |
| url | https://pse.agriculturejournals.cz/artkey/pse-201810-0004_association-of-carbon-isotope-discrimination-with-leaf-gas-exchange-and-water-use-efficiency-in-maize-following.php |
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