Cold hardiness in various organs and tissues of Rhododendron species and the supercooling ability of flower buds as the most susceptible organ

Mari Iwaya-Inoue, Shosuke Kaku

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

The freezing resistance of various organs and tissues was determined in 24 Rhododendron species (mainly Subgenus Tsutsutsi) having different ecological distributions. The order of hardiness for organ or tissue is as follows: leaf bud > wood ≧ bark > flower bud, and the flower bud is characterized as the most cold-susceptible organ. The relationship of killing temperature (KT) to northern distribution was the most significant in leaf buds compared to other organs and tissues. KTs of leaf buds for the most hardy species were -45 °C (or below) and those for the most tender species were about -23 °C, while KTs of flower buds were about -28 °C for the former and -16 °C for the latter. Although KTs of flower buds native to southwestern Japan were well correlated with the exothermic temperature distribution (ETD) of florets, those in the more northern species were generally lower than ETDs. The supercooling ability of flower buds appears to be sufficient to avoid the freezing stress since the extreme minimum temperature (EMT) at the northern limit of natural distribution for each tree species examined was not lower than the KT and ETD of the flower buds.

Original languageEnglish
Pages (from-to)310-317
Number of pages8
JournalCryobiology
Volume20
Issue number3
DOIs
Publication statusPublished - Jan 1 1983

Fingerprint

Rhododendron
Supercooling
supercooling
cold tolerance
buds
Tissue
Freezing
Temperature distribution
Temperature
Wood
temperature
freezing
tissues
Japan
florets
geographical distribution
bark

All Science Journal Classification (ASJC) codes

  • Agricultural and Biological Sciences(all)

Cite this

Cold hardiness in various organs and tissues of Rhododendron species and the supercooling ability of flower buds as the most susceptible organ. / Iwaya-Inoue, Mari; Kaku, Shosuke.

In: Cryobiology, Vol. 20, No. 3, 01.01.1983, p. 310-317.

Research output: Contribution to journalArticle

@article{2f5af84d0d054f02aea5b9a2d7f82024,
title = "Cold hardiness in various organs and tissues of Rhododendron species and the supercooling ability of flower buds as the most susceptible organ",
abstract = "The freezing resistance of various organs and tissues was determined in 24 Rhododendron species (mainly Subgenus Tsutsutsi) having different ecological distributions. The order of hardiness for organ or tissue is as follows: leaf bud > wood ≧ bark > flower bud, and the flower bud is characterized as the most cold-susceptible organ. The relationship of killing temperature (KT) to northern distribution was the most significant in leaf buds compared to other organs and tissues. KTs of leaf buds for the most hardy species were -45 °C (or below) and those for the most tender species were about -23 °C, while KTs of flower buds were about -28 °C for the former and -16 °C for the latter. Although KTs of flower buds native to southwestern Japan were well correlated with the exothermic temperature distribution (ETD) of florets, those in the more northern species were generally lower than ETDs. The supercooling ability of flower buds appears to be sufficient to avoid the freezing stress since the extreme minimum temperature (EMT) at the northern limit of natural distribution for each tree species examined was not lower than the KT and ETD of the flower buds.",
author = "Mari Iwaya-Inoue and Shosuke Kaku",
year = "1983",
month = "1",
day = "1",
doi = "10.1016/0011-2240(83)90019-6",
language = "English",
volume = "20",
pages = "310--317",
journal = "Cryobiology",
issn = "0011-2240",
publisher = "Academic Press Inc.",
number = "3",

}

TY - JOUR

T1 - Cold hardiness in various organs and tissues of Rhododendron species and the supercooling ability of flower buds as the most susceptible organ

AU - Iwaya-Inoue, Mari

AU - Kaku, Shosuke

PY - 1983/1/1

Y1 - 1983/1/1

N2 - The freezing resistance of various organs and tissues was determined in 24 Rhododendron species (mainly Subgenus Tsutsutsi) having different ecological distributions. The order of hardiness for organ or tissue is as follows: leaf bud > wood ≧ bark > flower bud, and the flower bud is characterized as the most cold-susceptible organ. The relationship of killing temperature (KT) to northern distribution was the most significant in leaf buds compared to other organs and tissues. KTs of leaf buds for the most hardy species were -45 °C (or below) and those for the most tender species were about -23 °C, while KTs of flower buds were about -28 °C for the former and -16 °C for the latter. Although KTs of flower buds native to southwestern Japan were well correlated with the exothermic temperature distribution (ETD) of florets, those in the more northern species were generally lower than ETDs. The supercooling ability of flower buds appears to be sufficient to avoid the freezing stress since the extreme minimum temperature (EMT) at the northern limit of natural distribution for each tree species examined was not lower than the KT and ETD of the flower buds.

AB - The freezing resistance of various organs and tissues was determined in 24 Rhododendron species (mainly Subgenus Tsutsutsi) having different ecological distributions. The order of hardiness for organ or tissue is as follows: leaf bud > wood ≧ bark > flower bud, and the flower bud is characterized as the most cold-susceptible organ. The relationship of killing temperature (KT) to northern distribution was the most significant in leaf buds compared to other organs and tissues. KTs of leaf buds for the most hardy species were -45 °C (or below) and those for the most tender species were about -23 °C, while KTs of flower buds were about -28 °C for the former and -16 °C for the latter. Although KTs of flower buds native to southwestern Japan were well correlated with the exothermic temperature distribution (ETD) of florets, those in the more northern species were generally lower than ETDs. The supercooling ability of flower buds appears to be sufficient to avoid the freezing stress since the extreme minimum temperature (EMT) at the northern limit of natural distribution for each tree species examined was not lower than the KT and ETD of the flower buds.

UR - http://www.scopus.com/inward/record.url?scp=0020773868&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0020773868&partnerID=8YFLogxK

U2 - 10.1016/0011-2240(83)90019-6

DO - 10.1016/0011-2240(83)90019-6

M3 - Article

C2 - 6884072

AN - SCOPUS:0020773868

VL - 20

SP - 310

EP - 317

JO - Cryobiology

JF - Cryobiology

SN - 0011-2240

IS - 3

ER -