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

In C4 plants, mesophyll cells (MCs) are engaged in CO2 pumping into bundle sheath cells (BSCs) to allow ribulose 1,5-bisphosphate carboxylase/oxygenase (Rubisco) to work under CO2-rich conditions, leading to various properties specific to C4 photosynthesis. Maize (Zea mays) is a representative C4 plant, but its senescing leaves exhibit C3-like photosynthetic properties. Under our culture conditions, first leaves of maize finished maturation by day 9 after sowing and then began to exhibit a considerable degree of O2 inhibition, a C3-like photosynthetic property. During senescence, the number and size of chloroplast nucleoids decreased in both MCs and BSCs, but the degradation of chloroplast-nucleoids, reportedly one of the earliest signs of senescence in photosynthetic organs, started earlier and proceeded faster in MCs than in BSCs, suggesting preferential senescence of MCs. Based on these results, we propose that preferential senescence in MCs may cause insufficient CO2 pumping into BSCs and lead to C3-like photosynthetic properties in senescing maize leaves.

C<sub>3</sub>-Like Photosynthetic Properties of Senescing Maize Leaves Are Accompanied by Preferential Senescence of Mesophyll Cells