Initiation of autumnal leaf senescence is crucial for plant overwintering and ecosystem dynamics. Previous studies have focused on the advanced stages of autumnal leaf senescence and reported that climatic warming delayed senescence, despite the fundamental differences among the stages of senescence. However, the timing of onset of leaf coloration (DLCO), the earliest visual sign of senescence, has rarely been studied. Here, we assessed the response of DLCO to temperature.
Location30\uffe2\uff80\uff9375\uffc2\uffb0\uffc2\uffa0N in the Northern Hemisphere.
Time period2000\uffe2\uff80\uff932018.
Major taxa studiedDeciduous vegetation.
MethodsWe retrieved DLCO from high\uffe2\uff80\uff90temporal\uffe2\uff80\uff90resolution satellite data, which were then validated by PhenoCam observations. We investigated the temporal changes in DLCO and the relationship between DLCO and temperature by using satellite and ground observations.
ResultsDLCO was not significantly (p\uffe2\uff80\uff89>\uffe2\uff80\uff89.05) delayed between 2000 and 2018 in 94% of the area. DLCO was positively (p\uffe2\uff80\uff89<\uffe2\uff80\uff89.05) correlated with pre\uffe2\uff80\uff90DLCO mean daily minimum temperature (Tmin) in only 9% of the area, whereas the end of leaf coloration (DLCE) was positively correlated with pre\uffe2\uff80\uff90DLCE mean Tmin over a larger area (34%). Further analyses showed that warming slowed the progress of leaf coloration. Interestingly, DLCO was less responsive to pre\uffe2\uff80\uff90DLCO mean Tmin in areas where daylength was longer across the Northern Hemisphere, particularly for woody vegetation.
Main conclusionsThe rate of progress of coloration is more sensitive to temperature than its start date, resulting in an extension of the duration of leaf senescence under warming. The dependence of DLCO response to temperature on daylength indicates stronger photoperiodic control on initiation of leaf senescence in areas with longer daylength (i.e., shorter nights), possibly because plants respond to the length of uninterrupted darkness rather than daylength. This study indicates that the onset of leaf coloration was not responsive to climate warming and provides observational evidence of photoperiod control of autumnal leaf senescence at biome and continental scales.
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Climate action", "0401 agriculture", " forestry", " and fisheries", "[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces", "leaf coloration onset", "[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces", " environment", "environment", "Biology", "Northern Hemisphere", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://onlinelibrary.wiley.com/doi/pdf/10.1111/geb.13581"}, {"href": "https://doi.org/10.1111/geb.13581"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Global%20Ecology%20and%20Biogeography", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1111/geb.13581", "name": "item", "description": "10.1111/geb.13581", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1111/geb.13581"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2022-02-15T00:00:00Z"}}, {"id": "10.1016/j.heliyon.2024.e26390", "type": "Feature", "geometry": null, "properties": {"updated": "2026-09-21T16:15:52Z", "type": "Journal Article", "created": "2024-02-20", "title": "Combined effect of an agro-industrial compost and light spectra composition on yield and phytochemical profile in mizuna and pak choi microgreens", "description": "This work aimed to evaluate the growth of two species of microgreens (mizuna and pak choi), using agro-industrial compost as growing media in two different mixes versus one hundred percent peat, under two different LED illumination spectra (LED 1 and LED 2) in a 14\u00a0h photoperiod. The experiment was carried-out for two times. Biomass yield, glucosinolates, and phenolic compounds, and nitrate (NO3-) content were analysed in leaf tissues. In both species, the highest fresh and dry biomass production was in compost:peat (50:50%) and LED 2 (Blue/Red/Far Red). In general, compost had a greater influence on nitrate content than light, but in the microgreen pak choi, the anthocyanin content was inhibited by the compost treatment. In the other hand both LED illumination had a positive effect on mizuna for glucosinolates and anthocyanins, and LED 2 also showed a positive effect on pak choi for anthocyanin. 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