Table 2 The mean (± SE) proportion fruit set of northern highbush blueberry (cv. ‘Bluecrop’) bushes exposed to either CT (25 °C, 4 h) or HT (37.5 °C, 4 h) temperature treatments at tight bud, bud swell, bud break, early pink bud, or late pink bud floral developmental stages. Significant differences between temperature treatments within a given developmental stage is indicated by different letters (⍺ ≦ 0.05).

From: Extreme heat affects blueberry pollen nutrition, bee health, and plant reproduction

Floral developmental stage

 

Tight bud

Bud swell

Bud break

Early pink bud

Late pink bud

Proportion fruit set

CT (25 °C, 4 h)

0.89 ± 0.06 a

0.95 ± 0.05 a

0.90 ± 0.07 a

0.80 ± 0.09 a

0.76 ± 0.12 a

HT (37.5 °C, 4 h)

0.89 ± 0.06 a

0.58 ± 0.13 b

0.73 ± 0.12 a

0.76 ± 0.11 a

0.65 ± 0.14 a

 

z=−0.02, p = 0.98

z = 2.32, p = 0.02

z = 1.22, p = 0.22

z = 0.31, p = 0.76

z = 0.59, p = 0.56

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