Ear Leaf Photosynthesis and Related Parameters of Transgenic and Non-GMO Maize Hybrids
Hybrid maize (Zea mays L.) through transgenics now includes δ-endotoxins for insect control and tolerance to the herbicides glyphosate and glufosinate. Some hybrids have multiple transgenic traits as part of their genotype (stacked gene). Limited information is available on how these traits alone af...
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2015-01-01
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| Series: | International Journal of Agronomy |
| Online Access: | http://dx.doi.org/10.1155/2015/731351 |
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| author | H. Arnold Bruns |
| author_facet | H. Arnold Bruns |
| author_sort | H. Arnold Bruns |
| collection | DOAJ |
| description | Hybrid maize (Zea mays L.) through transgenics now includes δ-endotoxins for insect control and tolerance to the herbicides glyphosate and glufosinate. Some hybrids have multiple transgenic traits as part of their genotype (stacked gene). Limited information is available on how these traits alone affect A (net assimilation rate; µmol CO2 m−2 s−1) and related physiological parameters. A two-year, two-location, irrigated experiment comparing four stacked gene, four glyphosate tolerant, and two non-GMO hybrids for ear leaf A, gs (stomatal conductance; mol H2O m−2 s−1), Em (transpiration; mol H2O m−2 s−1), IWUE (intrinsic water use efficiency; (A/(gs*100))), and Ci (intercellular [CO2] µmol CO2 mol air−1) was completed at Stoneville, MS, in 2012. Data were collected at growth stages R1 (anthesis) and R2 (early kernel filling) using a Li-Cor LI-6400XT set at 355 μmol mol−1 CO2 with a flow rate of 500 μmol s−1 and a 6400-02 light source set at 87.5% full sunlight. Measurements were made between 08:30 h and 11:30 h CST, within 48 h of 25 ha mm irrigation and ≥33.0% cloud cover. Transgenic traits did not influence the physiological parameters of A, gs, Em, IWUE, or Ci during the critical growth stages of R1 or R2. |
| format | Article |
| id | doaj-art-ee98d5cd8d9f4886b69671e914d8b6b3 |
| institution | Kabale University |
| issn | 1687-8159 1687-8167 |
| language | English |
| publishDate | 2015-01-01 |
| publisher | Wiley |
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| series | International Journal of Agronomy |
| spelling | doaj-art-ee98d5cd8d9f4886b69671e914d8b6b32025-02-03T01:30:38ZengWileyInternational Journal of Agronomy1687-81591687-81672015-01-01201510.1155/2015/731351731351Ear Leaf Photosynthesis and Related Parameters of Transgenic and Non-GMO Maize HybridsH. Arnold Bruns0USDA-ARS Crop Production Systems Research Unit, P.O. Box 350, Stoneville, MS 38776, USAHybrid maize (Zea mays L.) through transgenics now includes δ-endotoxins for insect control and tolerance to the herbicides glyphosate and glufosinate. Some hybrids have multiple transgenic traits as part of their genotype (stacked gene). Limited information is available on how these traits alone affect A (net assimilation rate; µmol CO2 m−2 s−1) and related physiological parameters. A two-year, two-location, irrigated experiment comparing four stacked gene, four glyphosate tolerant, and two non-GMO hybrids for ear leaf A, gs (stomatal conductance; mol H2O m−2 s−1), Em (transpiration; mol H2O m−2 s−1), IWUE (intrinsic water use efficiency; (A/(gs*100))), and Ci (intercellular [CO2] µmol CO2 mol air−1) was completed at Stoneville, MS, in 2012. Data were collected at growth stages R1 (anthesis) and R2 (early kernel filling) using a Li-Cor LI-6400XT set at 355 μmol mol−1 CO2 with a flow rate of 500 μmol s−1 and a 6400-02 light source set at 87.5% full sunlight. Measurements were made between 08:30 h and 11:30 h CST, within 48 h of 25 ha mm irrigation and ≥33.0% cloud cover. Transgenic traits did not influence the physiological parameters of A, gs, Em, IWUE, or Ci during the critical growth stages of R1 or R2.http://dx.doi.org/10.1155/2015/731351 |
| spellingShingle | H. Arnold Bruns Ear Leaf Photosynthesis and Related Parameters of Transgenic and Non-GMO Maize Hybrids International Journal of Agronomy |
| title | Ear Leaf Photosynthesis and Related Parameters of Transgenic and Non-GMO Maize Hybrids |
| title_full | Ear Leaf Photosynthesis and Related Parameters of Transgenic and Non-GMO Maize Hybrids |
| title_fullStr | Ear Leaf Photosynthesis and Related Parameters of Transgenic and Non-GMO Maize Hybrids |
| title_full_unstemmed | Ear Leaf Photosynthesis and Related Parameters of Transgenic and Non-GMO Maize Hybrids |
| title_short | Ear Leaf Photosynthesis and Related Parameters of Transgenic and Non-GMO Maize Hybrids |
| title_sort | ear leaf photosynthesis and related parameters of transgenic and non gmo maize hybrids |
| url | http://dx.doi.org/10.1155/2015/731351 |
| work_keys_str_mv | AT harnoldbruns earleafphotosynthesisandrelatedparametersoftransgenicandnongmomaizehybrids |