| Issue |
E3S Web Conf.
Volume 254, 2021
International Scientific and Practical Conference “Fundamental and Applied Research in Biology and Agriculture: Current Issues, Achievements and Innovations” (FARBA 2021)
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|
|---|---|---|
| Article Number | 02013 | |
| Number of page(s) | 6 | |
| Section | Mechanisms of Adaptation, Methods of its Regulation in Plants | |
| DOI | https://doi.org/10.1051/e3sconf/202125402013 | |
| Published online | 05 May 2021 | |
Features of adaptation of photosynthesis of winter wheat plant leaves to growing conditions
1 FSBEI HE Oryol State Agrarian University, CUC Plant Genetic Resources and their use, 302019, Orel, Russia
2 FSBEI HE Oryol State Agrarian University, Department of Crop Production, Breeding and Seed Production, 302019, Orel, Russia
* Corresponding author: amelin_100@mail.ru
Depending on the growing conditions, the intensity of photosynthesis of winter wheat plant leaves varies from 7.58 to 15.76 µmol CO2/m2s, significantly decreasing (on average by 41%) in dry and hot weather. During the day, its value varies from 7.07 to 12.48 µmol CO2/m2s, reaching a maximum (12.48 µmol CO2/m2s) in the morning (from 9:00 to 11:00 am), when the air temperature is not so high (from 18 to 23°C), and the light becomes saturating (1000 -1300 µmol/m2s). In the time following, the intensity of leaf photosynthesis decreases, reaching the minimum values at 7:00 pm. At the same time, the flag leaves of plants are characterized by the highest photosynthetic activity - from 12.56 to 16.16 µmol CO2/m2s, exceeding the pre-flag leaves by 1.6 times, and the lower ones by 3.1 times. The stomatal apparatus plays an important role in the adaptation of leaf photosynthesis to environmental factors. The correlation coefficient of photosynthesis intensity with stomatal conductivity in different leaf locations varied from 0.97 to 0.98.
© The Authors, published by EDP Sciences, 2021
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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