Supercooling ability, water content and hardiness of rhododendron flower buds during cold acclimation and deacclimation

Shosuke Kaku, Mari Iwaya-Inoue, K. B. Jeon

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

The relationship between supercooling ability and water content and killing temperature of flower buds during cold acclimation and deacclimation were studied using R. kiusianum and R. × akebono. The occurrence of multiple floret exotherms and their shift to a narrow range at lower subzero temperatures, as well as the marked decrease of florets water content, were observed as the symptoms of cold acclimation occuring in flower buds from fall to winter, and vice versa in spring buds during deacclimation. In R. kiusianum, the fully acclimated period was from November to March and two months longer than that of R. × akebono. The supercooling ability of the former was about -25°C and about -20°C in the latter. Although the water migration within bud tissues during the freezing process was determined in the acclimated and deacclimated buds for R. × akebono, no significant water changes could be observed, even in the acclimated buds. Thus, it is conceivable that deep supercooling in florets may result not necessarily from water migration from florets and bud axes to scales in response to freezing, but from low water content in situ of cold-acclimated or artificially dehydrated flower buds.

Original languageEnglish
Pages (from-to)1561-1569
Number of pages9
JournalPlant and Cell Physiology
Volume22
Issue number8
DOIs
Publication statusPublished - Jan 1 1981

Fingerprint

Rhododendron
supercooling
Acclimatization
acclimation
buds
water content
Water
florets
Freezing
freezing
Temperature
deacclimation
water
signs and symptoms (plants)
temperature

All Science Journal Classification (ASJC) codes

  • Physiology
  • Plant Science
  • Cell Biology

Cite this

Supercooling ability, water content and hardiness of rhododendron flower buds during cold acclimation and deacclimation. / Kaku, Shosuke; Iwaya-Inoue, Mari; Jeon, K. B.

In: Plant and Cell Physiology, Vol. 22, No. 8, 01.01.1981, p. 1561-1569.

Research output: Contribution to journalArticle

@article{8b6c60bd99784e9da1ec60e5ae465745,
title = "Supercooling ability, water content and hardiness of rhododendron flower buds during cold acclimation and deacclimation",
abstract = "The relationship between supercooling ability and water content and killing temperature of flower buds during cold acclimation and deacclimation were studied using R. kiusianum and R. × akebono. The occurrence of multiple floret exotherms and their shift to a narrow range at lower subzero temperatures, as well as the marked decrease of florets water content, were observed as the symptoms of cold acclimation occuring in flower buds from fall to winter, and vice versa in spring buds during deacclimation. In R. kiusianum, the fully acclimated period was from November to March and two months longer than that of R. × akebono. The supercooling ability of the former was about -25°C and about -20°C in the latter. Although the water migration within bud tissues during the freezing process was determined in the acclimated and deacclimated buds for R. × akebono, no significant water changes could be observed, even in the acclimated buds. Thus, it is conceivable that deep supercooling in florets may result not necessarily from water migration from florets and bud axes to scales in response to freezing, but from low water content in situ of cold-acclimated or artificially dehydrated flower buds.",
author = "Shosuke Kaku and Mari Iwaya-Inoue and Jeon, {K. B.}",
year = "1981",
month = "1",
day = "1",
doi = "10.1093/oxfordjournals.pcp.a076309",
language = "English",
volume = "22",
pages = "1561--1569",
journal = "Plant and Cell Physiology",
issn = "0032-0781",
publisher = "Oxford University Press",
number = "8",

}

TY - JOUR

T1 - Supercooling ability, water content and hardiness of rhododendron flower buds during cold acclimation and deacclimation

AU - Kaku, Shosuke

AU - Iwaya-Inoue, Mari

AU - Jeon, K. B.

PY - 1981/1/1

Y1 - 1981/1/1

N2 - The relationship between supercooling ability and water content and killing temperature of flower buds during cold acclimation and deacclimation were studied using R. kiusianum and R. × akebono. The occurrence of multiple floret exotherms and their shift to a narrow range at lower subzero temperatures, as well as the marked decrease of florets water content, were observed as the symptoms of cold acclimation occuring in flower buds from fall to winter, and vice versa in spring buds during deacclimation. In R. kiusianum, the fully acclimated period was from November to March and two months longer than that of R. × akebono. The supercooling ability of the former was about -25°C and about -20°C in the latter. Although the water migration within bud tissues during the freezing process was determined in the acclimated and deacclimated buds for R. × akebono, no significant water changes could be observed, even in the acclimated buds. Thus, it is conceivable that deep supercooling in florets may result not necessarily from water migration from florets and bud axes to scales in response to freezing, but from low water content in situ of cold-acclimated or artificially dehydrated flower buds.

AB - The relationship between supercooling ability and water content and killing temperature of flower buds during cold acclimation and deacclimation were studied using R. kiusianum and R. × akebono. The occurrence of multiple floret exotherms and their shift to a narrow range at lower subzero temperatures, as well as the marked decrease of florets water content, were observed as the symptoms of cold acclimation occuring in flower buds from fall to winter, and vice versa in spring buds during deacclimation. In R. kiusianum, the fully acclimated period was from November to March and two months longer than that of R. × akebono. The supercooling ability of the former was about -25°C and about -20°C in the latter. Although the water migration within bud tissues during the freezing process was determined in the acclimated and deacclimated buds for R. × akebono, no significant water changes could be observed, even in the acclimated buds. Thus, it is conceivable that deep supercooling in florets may result not necessarily from water migration from florets and bud axes to scales in response to freezing, but from low water content in situ of cold-acclimated or artificially dehydrated flower buds.

UR - http://www.scopus.com/inward/record.url?scp=0345048249&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0345048249&partnerID=8YFLogxK

U2 - 10.1093/oxfordjournals.pcp.a076309

DO - 10.1093/oxfordjournals.pcp.a076309

M3 - Article

AN - SCOPUS:0345048249

VL - 22

SP - 1561

EP - 1569

JO - Plant and Cell Physiology

JF - Plant and Cell Physiology

SN - 0032-0781

IS - 8

ER -