Changes of Lipid Metabolism and Their Effects on Cold Hardiness of Fapanese Pear during Flowering and Fruit Setting Periods.

Liao, Rutang; Tanabe, Kenji; Tamura, Fumio; Itai, Akihiro

doi:10.2525/ecb1963.35.21

Cited by 3 publications

(3 citation statements)

References 17 publications

(10 reference statements)

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“…Lipids and proteins infl uence the stability of the plasmalemma during freezing. Consequently, PDJ may affect alterations of the lipid composition of the plasmalemma and thus stability of the plasmalemma during freezing stress (Liao et al, 1997).…”

Section: Discussionmentioning

confidence: 99%

“…So far, little is known about spring frost damage in fl ower buds of the Japanese pear. Involvement of galactolipids and phospholipids and their fatty acid composition in fl owers and fruitlets of the Japanese pear appear to be related to cold hardiness (Liao et al, 1997). On the other hand, Inomata et al (1992) reported gibberellin treatment to fl owers of Japanese pear after frost damage increased fruiting rate.…”

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confidence: 99%

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Cold Tolerance in 'Kousui' Japanese Pear and Possibility for Avoiding Frost Injury by Treatment with n-Propyl Dihydrojasmonate

Sekozawa¹,

Sugaya²,

Gemma³

et al. 2003

HortSci

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Effects of n-propyl dihydrojasmonate (PDJ) treatment on flowers of Japanese pear 'Kousui' (Pyrus pyrifolia Nakai cv. Kousui) during spring frost were investigated to study mechanisms for avoiding spring frost injury. PDJ applied during the flowering period resulted in a lower injury index for the ovules and pistils after freezing tests. Average ion leakage in control flowers was 37.9% during the balloon stage at -5 °C, while the flowers treated with PDJ displayed a 16.6% ion leakage. Similarly, at the full bloom stage, PDJ treatment reduced ion leakage at -5 °C from 73.1% to 47.8% in the control. The organs of the flower more sensitive to low temperature stress were the ovule, pistil, and ovary; stamens were more resistant. Sugar content in the flower at the balloon stage was increased by PDJ when treated at the pink stage. Moreover, free amino acids, especially proline, increased similarly with PDJ treatment. These results show that PDJ affects supercooling capacity of a flower by changing solute content and protects organs from freezing.

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Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

Cold Tolerance in 'Kousui' Japanese Pear and Possibility for Avoiding Frost Injury by Treatment with n-Propyl Dihydrojasmonate

Sekozawa¹,

Sugaya²,

Gemma³

et al. 2003

HortSci

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“…Sun et al (1987) recorded in North China that among pear cultivars, European pear (P. communis) is most cold tolerant, followed by 'Qiuzili' (P. ussuriensis), 'Baili' (P. bretschneideri), and Japanese pear (P. pyrifolia) is among the least tolerant species. The majority of research on the cold tolerance of plants has focused on the regulation of cell permeability and fatty acid composition of biological membranes (Liao et al, 1996(Liao et al, , 1997aWang and Faust, 1990) and physiological osmoregulation (Hasegawa, 2002). P. betulaefolia's high cold tolerance may depend on its lower osmotic potential as described above.…”

Section: ) Research On Cold Tolerancementioning

confidence: 99%

Recent Advances in Research on Japanese Pear Rootstocks

Tamura

2012

J. Japan. Soc. Hort. Sci.

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In this paper, I review recent advances in research on Japanese pear rootstocks. Several clones of Pyrus betulaefolia and P. calleryana seedlings have been identified based on their ability to induce dwarfing scion growth, and their use in the future as dwarfing rootstock is anticipated. Among the various rootstock species, P. betulaefolia exhibits good adaptability to different environmental conditions, with high tolerance to drought, cold, and salt. This is due, in part, to P. betulaefolia's superior ability to regulate osmotic potential and ability to maintain a high degree of unsaturation in fatty acids in biological membranes during cold hardening. P. calleryana exhibits not only a relatively high drought tolerance but also the highest flood tolerance. This tolerance depends on the ability of P. calleryana to shift to alcohol fermentation under anaerobic conditions and to expel the ethanol thus generated. These two rootstock species are highly effective in preventing fruit-hardening disorders. While P. betulaefolia exhibits high salt tolerance among native Asian Pyrus species, it is exceeded in this respect by two native Mediterranean species, P. amygdaliformis and P. elaeagrifolia, with a mechanism to inhibit the transport of salts from the roots to above-ground plant parts. Furthermore, P. xerophila exhibits superior Fe 3+ -chelate reductase activity in roots, endowing the species with tolerance to alkaline soils.

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Influences of Applied Nitrogen Amount in Autumn on Cold Hardiness and Lipid Content of Japanese Pear

Matsumoto¹,

Kato²,

Takemura³

et al. 2010

Engeigaku kenkyuu

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We investigated the influence of the amount of applied nitrogen on cold hardiness and lipid content of Japanese pear 'Nijisseiki' and 'Hosui'. 'Hosui' was more sensitive to excessive nitrogen application than 'Nijisseiki' as shown by the increase of nitrogen contents in the shoot, decrease of cold hardiness and growth inhibition the next spring. Total lipid content and phosphatidylcholine (PC) content of 'Hosui' were lower than 'Nijisseiki'. An increase in lipid PC and unsaturated lipid content induced by chilling were inhibited by excessive nitrogen application in both cultivars. Thus, excessive nitrogen application may induce a decrease in cold hardiness by decreasing the lipid content and the unsaturated index.

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Changes of Lipid Metabolism and Their Effects on Cold Hardiness of Fapanese Pear during Flowering and Fruit Setting Periods.

Cited by 3 publications

References 17 publications

Cold Tolerance in 'Kousui' Japanese Pear and Possibility for Avoiding Frost Injury by Treatment with n-Propyl Dihydrojasmonate

Cold Tolerance in 'Kousui' Japanese Pear and Possibility for Avoiding Frost Injury by Treatment with n-Propyl Dihydrojasmonate

Recent Advances in Research on Japanese Pear Rootstocks

Influences of Applied Nitrogen Amount in Autumn on Cold Hardiness and Lipid Content of Japanese Pear

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