Potassium deficiency impedes elevated carbon dioxide-induced biomass enhancement in well-watered or drought-stressed bread wheat

Asif, Muhammad and Yılmaz, Özlem and Öztürk, Levent (2017) Potassium deficiency impedes elevated carbon dioxide-induced biomass enhancement in well-watered or drought-stressed bread wheat. (Accepted/In Press)

Warning
There is a more recent version of this item available.
[thumbnail of 201600616_galley_proof.pdf] PDF
201600616_galley_proof.pdf
Restricted to Registered users only

Download (439kB) | Request a copy

Abstract

Potassium (K) deficiency reduces photosynthesis and biomass production of crop plants and also renders them vulnerable to drought stress, whereas elevated carbon dioxide (CO2) has a positive effect on photosynthesis and yield and ameliorates the adverse effects of drought stress. This study aimed to characterize the physiological responses of wheat (Triticum aestivum L.) stressed with K deficiency under elevated CO2 and drought conditions. Increased biomass production caused by elevated CO2 as a consequence of increased photosynthesis and water use efficiency was absent in young K-deficient wheat plants. Shoot K concentration was negatively affected by elevated CO2 particularly under K-deficient conditions, whereas K content per plant was greatest in plants supplied with adequate K and adequate water. Specific leaf weight was increased as a consequence of carbohydrate accumulation in the source leaves of K-deficient plants particularly under elevated CO2 and drought stress. Potassium deficiency clearly impeded the impact of elevated CO2 in both well-watered as well as drought-stressed plants. Adequate K fertilization is a prerequisite for efficient harvesting of atmospheric CO2 through increased photosynthesis, decreased transpiration, and increased biomass production under changing atmospheric CO2 and soil moisture conditions.
Item Type: Article
Subjects: S Agriculture > S Agriculture (General) > S589.7 Agricultural ecology (General)
S Agriculture > SB Plant culture > SB183-317 Field crops
Q Science > QK Botany > QK710-899 Plant physiology
Divisions: Faculty of Engineering and Natural Sciences > Academic programs > Biological Sciences & Bio Eng.
Faculty of Engineering and Natural Sciences
Depositing User: Levent Öztürk
Date Deposited: 03 Aug 2017 16:02
Last Modified: 02 Feb 2021 14:22
URI: https://research.sabanciuniv.edu/id/eprint/32573

Available Versions of this Item

Actions (login required)

View Item
View Item