Variations in assimilation rate, photoassimilate translocation, and cellular fine structure of potato cultivars (Solanum Tuberosum L.) exposed to elevated CO2

Publication date: Available online 19 July 2018Source: Plant Physiology and BiochemistryAuthor(s): Mohammad Javad Ahmadi Lahijani, Mohammad Kafi, Ahmad Nezami, Jafar Nabati, Mohammad Zare Mehrjerdi, Shirin Shahkoomahally, John ErwinAbstractRising atmospheric CO2 concentrations are expected to impact the productivity of plants. Cultivars demonstrate different responses to CO2 levels, hence, screening and recognizing the cultivars with a higher capacity for translocation of photoassimilates would certainly be beneficiary. To investigate the interactive impact of enhancing CO2 on physiology, cellular fine structure and photoassimilate translocation of micro-propagated potato plantlets, plantlets (cvs. Agria and Fontane) were grown under ambient (400 ppm) or elevated (800 ppm) CO2 concentrations in controlled environments. These high-yielding cultivars are widely cultivated in Iran and have a wide range of consumption as fresh marketing, French fries, and chips industry. Transmission electron micrographs showed an increase in the length, width, and area of chloroplasts. The number of chloroplasts per cell area was significantly increased in Agria at elevated CO2. Also, there was an increase in mitochondria number in Agria and Fontane. Chloroplast number and Np were increased by a similar magnitude at doubled CO2, while, mitochondria number was increased greater than the leaf Rd enhancement at elevated CO2. Elevated CO2 increased net photosynthesis, dark respiration (Rd), and ...
Source: Plant Physiology and Biochemistry - Category: Biochemistry Source Type: research