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

Understanding the mechanisms underlying variations in carbon isotope discrimination ( Δ ) in C4 plants is critical for predicting the C3/C4 ratio in C3/C4 mixed grassland. The value of  Δ  is determined by bundle sheath leakiness ( Ф ) and the ratio of intercellular to ambient CO 2  concentration ( C    i  / C    a  ). Leaf nitrogen concentration ( N    leaf  ) is considered a driver of  Δ  in C4 plants. However, little is known about how  N    leaf   affects  Ф  and  C    i  / C    a  , and subsequently  Δ . Here leaf carbon isotope composition,  N    leaf  ,  Ф , and leaf gas exchange were measured in  Cleistogenes squarrosa , a dominant C4 species in the Inner Mongolia grassland.  Δ  remained relatively stable under variable N and water supply. Higher N supply and lower water supply increased  N    leaf  , stimulated photosynthesis and further decreased  C    i  / C    a  . High N supply increased  Ф , which responded weakly to water supply.  N    leaf   exerted similar effects on  C    i  / C    a   and on  Ф  in the field and pot experiments. Pooling all the data,  N    leaf   explained 73% of the variation in  C    i  / C    a  . Overall, both  Ф  and  C    i  / C    a   determined  Δ ; however, the contribution of  Ф  was stronger.  N    leaf   influenced  Δ  primarily though  C    i  / C    a  , rather than  Ф .  Ф  should be considered in estimating  Δ  of C4 endmember.

Determination of leaf carbon isotope discrimination in C4 plants under variable N and water supply