Influence of temperature on blackthorn (<I>Prunus spinosa</I> L.) phenophases in spring season

Abstract

Phenology is the study of periodic biologic changes that plants are going through, under the influence of environmental factors, especially temperature. The present paper evaluates the behaviour of Prunus spinosa L. genotypes under the fluctuations of climatic factors by calculating the average time elapsed from bud-breaking to blooming, the average time elapsed between different phenophases, the heat demand and the chilling requirement. The data obtained show that the onset of spring season phenological phases is significantly speeded-up by temperatures increase and provides useful information on temperature influence on phenologic phased triggering and better understanding of temperature influence on phenology in Prunus spinosa L. genotypes in Oltenia region of Romania.

Variability of Phenological Behaviours of Wild Fruit Tree Species Based on Discriminant Analysis

“…Regarding the budding of C. monogyna , Fichtner and Wissemann [ 20 ] report the period from mid-March to April, depending on altitude and location, and the April to June period was reported for the “end of flowering period”. The results obtained within the P. spinosa species are in accordance with those obtained by Cosmulescu and Calusaru Gavrila [ 21 ] in Romania. Regarding the “full flowering” phenophase, taking into account the Julian date, the order in which this phenophase is triggered is as follows: Prunus spinosa (94.67 days); Pyrus pyraster (97.33 days); Malus sylvestris (102.67 days); Crataegus monogyna (123 days); Crataegus pentagyna (138 days); Rosa canina (143 days); Sambucus nigra (146 days); and Rubus caesius (179.67 days).…”

Differences between flower and leaf phenological responses to environmental variation drive shifts in spring phenological sequences of temperate woody plants

“…Support for the FHH is most often associated with observational studies (e.g. Cosmulescu & Calusaru, 2020; Guo et al., 2014). By contrast, experimental studies which manipulate chilling levels beyond historically observed minima in the field tend to support the DSH (e.g.…”

“…One hypothesis suggests that reproductive and vegetative buds utilize the same underlying environmental cues, but have different threshold responses to forcing, with whichever bud type bursts later—leaves or flowers—having a higher thermal requirement (i.e. they need a greater sum of warm temperature to trigger the phenological event, Cosmulescu & Calusaru, 2020; Cosmulescu & Ionescu, 2018; Guo et al., 2014). Under this hypothesis, which we call the forcing hierarchy hypothesis (FHH), leaf and flower buds share the same suite of cues and develop similarly to non‐forcing cues (i.e.…”

The Influence of Variety and Climatic Year on the Phenology of Blueberry Grown in the Banat Area, Romania

“…This aspect is one of the most important reasons for knowing the phenology of each variety cultivated in each plantation. Abiotic factors, especially temperature and humidity, do influence the date on which different phenophases appear and their duration, for example: bud swelling (bursting), flowering, fruit ripening and leaf fall [2][3][4]. Monitoring these environmental factors can be particularly important for farmers who want to introduce management practices at various stages of crop development.…”