Therefore, the change in plastid pigments associated with leaf senescence is somewhat different from the active conversion to chromoplasts observed in fruit and flowers.

The breakdown serves as a prerequisite in the detoxification of the potentially phototoxic chlorophyll and chlorophyll intermediates as it accompanies leaf senescence to non-fluorescent catabolites.

(1965) Regulation of protein and nucleic acid synthesis by gibberellin during leaf senescence.

It is not frost but the shortening of the day that triggers the start of leaf senescence.

Several different pathways may lead to increases in photosynthesis, including higher levels of the Rubisco enzyme and delays in leaf senescence (Stowe et al. 2000).

During leaf senescence, a portion of the plant's nutrients are reabsorbed into the leaves.

The nutrient concentrations in litterfall differ from the nutrient concentrations in the mature foliage by the reabsorption of constituents during leaf senescence.

They are involved primarily in cell growth and differentiation, but also affect apical dominance, axillary bud growth, and leaf senescence.

A study that regulated leaf senescence in tobacco leaves found that wild-type leaves yellowed while transgenic leaves remained mostly green.

Following its role in defense, JAs have also been implicated in cell death and leaf senescence.