English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Bench-grafted Fuji/M26 apple ( Malus domestica  Borkh) trees were fertigated with different concentrations of nitrogen by using a modified Hoagland's solution for 45 days. CO 2  assimilation and actual photosystem II (PSII) efficiency in response to incident photon flux density (PFD) were measured simultaneously in recent fully expanded leaves under low O 2  (2%) and saturated CO 2  (1300 ppm) conditions. A single curvilinear relationship was found between true quantum yield for CO 2  assimilation and actual PSII efficiency for leaves with a wide range of leaf N content. The relationship was linear up to a quantum yield of approximately 0.05 mol CO 2 /mol quanta, then became curvilinear with a further rise in quantum yield in response to decreasing PFD. This relationship was subsequently used as a calibration curve to assess the rate of linear electron transport associated with rubisco and partitioning of electron flow between CO 2  assimilation and photorespiration in different N leaves in response to intercellular CO 2  concentration (C i ) under normal O 2  conditions. Both the rate of linear electron flow, and the rate to CO 2  or O 2  increased with increasing leaf N at any given C i , but the percentage of linear electron flow to CO 2  assimilation remained the same regardless of leaf N content. As C i  increased, the percentage of linear electron flow to CO 2  assimilation increased. In conclusion, the relationship between actual PSII efficiency and quantum yield for CO 2  assimilation and the partitioning of electron flow between CO 2  assimilation and photorespiration are not affected by N content in apple leaves.

hortscience

159 The Relationship between Actual Photosystem II Efficiency and Quantum Yield for CO2 Assimilation is Not Affected by Nitrogen Content in Apple Leaves