Supercooling Ability, Water Content and Hardiness of Rhododendron Flower Buds during Cold Acclimation and Deacclimation
スポンサーリンク
概要
- 論文の詳細を見る
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℃ and about -20℃ 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.
- 日本植物生理学会の論文
著者
-
Kaku Shosuke
Biological Laboratory College Of General Education Kyushu University
-
Iwaya Mari
Biological Laboratory College Of General Education Kyushu University
-
Jeon K.b.
Department Of Biology Jeonbug National University
-
Iwaya Mari
Biological Laboratory, College of General Education, Kyushu University
関連論文
- Characteristic Changes in Relaxation Times of Water Protons in Vigna radiata Seedlings Exposed to Temperature Stress
- Estimation of the Freezing Injury in Flower Buds of Evergreen Azaleas by Water Proton Nuclear Magnetic Resonance Relaxation Times
- Relationship of Nuclear Magnetic Resonance Relaxation Time to Water Content and Cold Hardiness in Flower Buds of Evergreen Azalea
- Factors Affecting the Prolongation of NMR Relaxation Times of Water Protons in Leaves of Woody Plants Affected by Formation of Insect Galls
- Anthocyanin Influence on Water Proton NMR Relaxation Times and Water Contents in Leaves of Evergreen Woody Plants During the Winter
- Statistical Studies Using AIC Method to Decide the Question of "Break" or "Straight" in Arrhenius Plots of Water Proton NMR Relaxation Times in Chilling-Sensitive Vigna and Insensitive Pisum Seedlings
- Estimation of Chilling Sensitivity and Injury in Gloxinia Leaves by the Thermal Hysteresis of NMR Relaxation Times of Water Protons
- Cold Hardiness and Acclimation Intensity in Flower Buds for Fall Bloom and Spring Bloom Clones in Rhododendron kiusianum, a Dwarf Evergreen Azalea
- Supercooling ability of Rhododendron flower buds in relation to cooling rate and cold hardiness
- Changes in supercooling and freezing processes accompanying leaf maturation in Buxus
- Effects of Temperature on Cold Acclimation and Deacclimation in Flower Buds of Evergreen Azaleas
- Monitoring Primary Response to Chilling Stress in Etiolated Vigna radiata and V. mungo Seedlings Using Thermal Hysteresis of Water Proton NMR Relaxation Times
- A possible role of the endodermis as a barrier for ice propagation in the freezing of pine needles
- Supercooling Ability, Water Content and Hardiness of Rhododendron Flower Buds during Cold Acclimation and Deacclimation
- High ice nucleating ability in plant leaves