Elevated Atmospheric CO2 Concentration Influences the Rooting Habits of Winter-Wheat (Triticum aestivum L.) Varieties

Abstract

The intensity and the frequency of extreme drought are increasing worldwide. An elevated atmospheric CO2 concentration could counterbalance the negative impacts of water shortage; however, wheat genotypes show high variability in terms of CO2 reactions. The development of the root system is a key parameter of abiotic stress resistance. In our study, biomass and grain production, as well as the root growth of three winter-wheat varieties were examined under optimum watering and simulated drought stress in a combination with ambient and elevated atmospheric CO2 concentrations. The root growth was monitored by a CI-600 in situ root imager and the photos were analyzed by RootSnap software. As a result of the water shortage, the yield-related parameters decreased, but the most substantial yield reduction was first detected in Mv Karizma. The water shortage influenced the depth of the intensive root development, while under water-limited conditions, the root formation occurred in the deeper soil layers. The most intensive root development was observed until the heading, and the maximum root length was recorded at the beginning of the heading. The period of root development took longer under elevated CO2 concentration. The elevated CO2 concentration induced an accelerated root development in almost every soil layer, but generally, the CO2 fertilization induced in the root length of all genotypes and under each treatment.

Impact of Ground Applied Micronutrients on Root Growth and Fruit Yield of Severely Huanglongbing-Affected Grapefruit Trees

“…Images were taken at 300 DPI and analyzed using CI-690 RootSnap! software (CID Bio-Science Inc., Camas, WA, USA) for root count, root length, and root diameter following similar methodology described in DoVale and Fritsche-Neto and Varga et al [36,37].…”

Plant Breeding Supporting the Sustainable Field Crop Production

“…The water shortage induced intensive root development in the deeper soil layers and under elevated CO 2 concentration, the distribution of the root system was more homogeneous in the whole soil profile. The maximum root length was detected at the beginning of the heading, and this period took longer under elevated CO 2 concentration [7].…”

“…The presence of these genes in the genome not only reduces the plant height but can also negatively impact the intensity of root development and root morphology. The impacts of the water withdrawal and the elevated CO 2 level on the root structure of three winter wheat cultivars carrying different dwarfing genes were studied by using in situ root scanning technology [7]. The water shortage induced intensive root development in the deeper soil layers and under elevated CO 2 concentration, the distribution of the root system was more homogeneous in the whole soil profile.…”