Abstract
The effect of short-term chilling (to 4 ° С for 1 day) on the growth and water metabolism in winter wheat ( Triticum aestivum L.) when combined with optimal (2 ﾊM) and excessive (1000 ﾊM) zinc content in the root area was studied in a controlled environment. In the plants growing in a medium with optimal zinc content a 1 day exposure to the 4 ° С temperature caused a reduction of the stomatal pore size, a decline in stomatal conductance and transpiration rate. These modifications supposedly act as defensive adaptations meant to maintain a high water content in the leaves and support the increment of the above-ground biomass. Where the metal concentration in the root area was excessive, there was a heavier decline in stomatal conductance and transpiration rate, and yet the water content in the leaves somewhat decreased. Furthermore, plants in this treatment demonstrated a partial closure of stomata and a considerable decrease in their number. The above changes in the stomatal system together with a slower increment of the root biomass pointing to inhibition of their growth must have been the main reasons for a disruption of the water metabolism in the wheat plants exposed to a low temperature coupled with excessise zinc content in the root area.
Highlights
Ключевыеслова: Triticum aestivum L.; цинк; низкая положительная температура; сырая и сухая биомасса; оводненность; устьичная проводимость; транспирация
The effect of short-term chilling on the growth and water metabolism in winter wheat (Triticum aestivum L.) when combined with optimal (2 μM) and excessive (1000 μM) zinc content in the root area was studied in a controlled environment
In the plants growing in a medium with optimal zinc content a 1 day exposure to the 4 °С temperature caused a reduction of the stomatal pore size, a decline in stomatal conductance and transpiration rate
Summary
Объектом исследования служили растения озимой пшеницы (Triticum aestivum L.) с. Московская 39, которые выращивали в камере искусственного климата в рулонах фильтровальной бумаги при температуре 22 °С, относительной влажности воздуха 60–70 %, ФАР 100 мкмоль/(м2·с), 14‐часовом фотопериоде, на питательном растворе Хогланда – Арнона с добавлением микроэлементов, в том числе цинка в оптимальной (2 мкМ) (контроль) или в избыточной (1000 мкМ) концентрации. О влиянии данной температуры на некоторые показатели роста и водный обмен растений в условиях оптимального и высокого содержания цинка в корнеобитаемой среде судили по накоплению сырой и сухой биомассы корня и побега, оводненности тканей, состоянию устьичного аппарата и интенсивности транспирации. Устьичную проводимость и интенсивность транспирации анализировали на установке для исследования СО2‐газообмена и водяных паров HСM-1000 (Walz, Германия). Влияние температуры 4 °С на некоторые показатели водного обмена растений пшеницы с. Московская 39 при оптимальной (2 мкМ) и высокой (1000 мкМ) концентрации цинка в корнеобитаемой среде. Moskovskaya 39 when combined with optimal (2 μM) and high (1000 μM) zinc concentrations in the root area
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Proceedings of the Karelian Research Centre of the Russian Academy of Sciences
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
