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Table 1 Phenological condition and cold hardiness of (A) maple and (B) oak species

From: Standardization of electrolyte leakage data and a novel liquid nitrogen control improve measurements of cold hardiness in woody tissue

Species Condition Critical Values for Electrolyte Leakage Visual LT50, ℃ LST, ℃ LTE, ℃
Anderson Flint Limlogistic Limgompertz Limgompertz
LT50, ℃ LT50, ℃ LT50, ℃ LT50, ℃ LTmax, ℃
(A). Maple (Acer) data from the present study
A. saccharum Dormant − 28b − 28b − 26 cd − 26 cd − 21bc − 29ab − 33ab − 36bc
A. pseudoplatanus Dormant − 20ab − 20ab − 22bc − 22bcd − 18abc − 30ab − 33ab − 38 cd
A. rubrum Budbreak − 16ab − 16ab − 17ab − 17ab − 14ab − 18a − 17a − 35b
A. platanoides Dormant − 25ab − 24ab − 25bcd − 25bcd − 20bc − 27ab − 30ab − 35b
A. campestre Dormant − 25ab − 25b − 32d − 33d − 26c − 36b − 40b − 37 cd
A. hyrcanum Dormant − 23b − 23ab − 23bc − 23bcd − 18abc − 30ab − 33ab − 36ab
A. tataricum Bud swelling − 18ab − 18ab − 19abc − 19abc − 14ab − 19a − 20ab − 36bcd
A. tegmentosum Budbreak − 18ab − 17ab − 18abc − 18abc − 14ab − 17a − 23ab − 36bcd
A. caudatifolium Budbreak − 12a − 12a − 13a − 13a − 11a − 20a − 20ab − 20a
A. davidii Bud swelling − 17ab − 18ab − 19abc − 20abc − 16ab − 21a − 27ab − 20a
A. spicatum Dormant − 20ab − 21ab − 20abc − 21abc − 16ab − 27ab − 23ab − 38d
A. negundo Dormant − 27b − 27b − 24bcd − 26bcd − 18abc − 20a − 23ab − 36bcd
(B). Oak (Quercus) data from Fallon and Cavender-Bares (2018)      Published LT50, ℃ N
Q. arizonica Acclimated − 22b − 21bc − 21bc − 21bc − 18b − 34 39
Unacclimated − 12a − 12a − 12a − 12a − 10a − 16 44
Q. emoryi Acclimated − 26c − 26d − 25d − 26d − 23c − 29 12
Unacclimated − 14a − 14a − 14a − 14a − 11a − 15 10
Q. gambelii Acclimated − 22b − 21bc − 21bc − 21bc − 18b − 33 17
Unacclimated − 11a − 11a − 12a − 12a − 10a − 20 16
Q. grisea Acclimated − 25bc − 25 cd − 25 cd − 26 cd − 23c Not calculated 2
Unacclimated − 16ab − 15ab − 15ab − 15ab − 12ab Not calculated 2
Q. hypoleucoides Acclimated − 22b − 21bc − 21bc − 21bc − 18b − 23 39
Unacclimated − 13a − 13a − 13a − 13a − 11a − 13 40
Q. rugosa Acclimated − 24bc − 23 cd − 23 cd − 23 cd − 19bc − 32 16
Unacclimated − 13a − 13a − 13a − 13a − 11a − 17 17
  1. Phenological condition at sampling and critical values of cold hardiness for electrolyte leakage, lowest survival temperatures (LSTs), and low temperature exotherms (LTEs) for A) maple species (n = 3) and B) oak species-acclimation combinations (sample size and originally published critical values as noted; Fallon and Cavender-Bares, 2018). In cases for which differences among species are significant, superscripts indicate results of a Tukey's HSD post-hoc test (α = 0.05). Samples vary in phenological condition at the time of sampling. Maples were sampled at various points ranging from dormancy to post-budbreak in early spring. Oaks were sampled while either cold-acclimated (winter) or unaccclimated (summer)