Recovery after freezing in Avena sativa L., Lolium perenne L. and L. multiflorum Lam.

Eagles, C. F.; Williams, Jill; Louis, D. V.

doi:10.1111/j.1469-8137.1993.tb03759.x

Cited by 32 publications

(18 citation statements)

References 34 publications

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“…Increased membrane cryostability is a prerequisite for freezing tolerance because freeze-induced destabilization of cellular membranes is the primary cause of injury in plants (Steponkus et al 1993;Shao et al 2008). An additional role of sugars during cold acclimation is that they may function as nutrients that allow plants to survive the lower temperatures and dryland conditions as well as recover from freezing stress (Eagles et al 1993;Trunova 1982;Shao et al 2008). Another important parameter to determine the effectiveness of the plasma membrane amounts is the relative electrolyte leakage, which reflects the degree of damage to the delicate and sensitive membrane (Campos et al 2003).…”

Section: Discussionmentioning

confidence: 99%

Genetic transformation of lipid transfer protein encoding gene in Phalaenopsis amabilis to enhance cold resistance

et al. 2010

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Embryogenic callus of Phalaenopsis amabilis derived from leaf tissue was cocultivated with Agrobacterium tumefaciens strain LBA4404 harboring a plant cloning vector. The vector carried the lipid transfer protein (LTP) encoding gene cloned from cold tolerant Brazilian upland rice cv. IAPAR 9. The highest transformation efficiency (12.16%) was obtained when 1-2 mm calli were infected and cocultivated with 0.4 (OD 600 ) A. tumefaciens for 20 min. Transgene integration of kan-resistant plants was confirmed through polymerase chain reaction analysis and Southern hybridization. Four hundred seventy transgenic plants, each derived from an independent protocorm-like body, were obtained. The expression of rice cold-inducible LTP gene in transgenic P. amabilis improved its adaptive responses to cold stress. The examination of transgenic plants revealed that enhanced cold tolerance was most likely due to the increased accumulation of several compatible solutes such as total soluble sugars, proline, antioxidant superoxide dismutase, decreased accumulation of malondialdehyde, and maintained electrolytes within the membrane compared with controls.

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Section: Discussionmentioning

confidence: 99%

Genetic transformation of lipid transfer protein encoding gene in Phalaenopsis amabilis to enhance cold resistance

et al. 2010

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“…Harrison et al (1997) noticed that in hardened material of L. perenne varieties recovery of photosynthetic efficiency was observed in plants frozen to as low as -11°C. According to Eagles et al (1993) improved survival of whole plant of L. perenne was associated with ability to produce viable regrowth from tillers after freezing to lower temperatures.…”

Section: Resultsmentioning

confidence: 99%

Low temperature and hardening effects on photosynthetic apparatus efficiency and survival of forage grass varieties

Borawska-Jarmułowicz¹,

Mastalerczuk²,

Pietkiewicz³

et al. 2014

PLANT SOIL ENVIRON

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Freezing tolerance is essential for perennial plants and ability to adapt to extreme temperature is crucial for their survival in many environments. Freezing tolerance of hardened and unhardened plants of Dactylis glomerata and Lolium perenne varieties was probed by their quantum photosynthetic efficiency using the chlorophyll fluorescence technique. Quantum yield of photosystem II (PSII) electron transport (Φ PSII ), maximal (F m ') and steady-state (F s ) chlorophyll fluorescence yields of light-adapted samples were measured. Φ PSII depended on developmental phase, temperature and hardening process. A clear decline in PSII activity, especially after -10°C application was observed. Plant hardening during emergence phase had a positive impact on PSII activity, especially after -5°C application. After 72 h of -5°C temperature treatment, hardened plants showed quicker recovery of their photosynthetic apparatus (0.527-0.697) as compared to unhardened ones (0.224-0.330). Stress temperature of -10°C caused irreversible changes of photosynthetic apparatus of hardened and unhardened plants independently of growth phases (0.003-0.014). Φ PSII and F m ' parameters were strongly correlated with shoots survival under stress. Our results suggest that perennial plants' hardening allows them to survive low temperatures due inter alia enhancing their photosynthetic machinery performance.

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“…This variety is based on Swiss material originating from an upland site with intermittent snow cover and alternating cold/mild conditions. In AberHerald, which is also based on Swiss material but from a site with almost continuous snow cover, the LT 50 was -7.5°C (Eagles et al 1994). An interesting difference between the varieties was observed after 7 d dehardening at temperatures ranging from 4 to12°C.…”

Section: Pasture Plant Breedingmentioning

confidence: 99%

“…This daylength control provides a safety belt appropriate to its conditions of origin, in which too early a response to increased temperature could prove fatal. Other growth room evidence suggests that a daylength of 12 h, which is sufficient to produce leaf size increases (Eagles et al 1994) would permit dehardening.…”

Section: Pasture Plant Breedingmentioning

confidence: 99%

“…Regrowth was established after the death of the main apex from quiescent lateral tiller buds with apparently undifferentiated tissues (Eagles et al 1993). There are interesting parallels between this phenomenon and observations of the appearance of many very small new tillers after prolonged drought from quiescent buds (Françoise Volaire, personal communication).…”

Section: Pasture Plant Breedingmentioning

confidence: 99%

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Pasture research in the UK: Present knowledge and future prospects

Davies¹

1998

Can. J. Plant Sci.

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Davies, A. 1998. Pasture research in the UK: present knowledge and future prospects. Can. J. Plant Sci. 78: 211-216. Pasture research in the UK has increasingly been aimed at understanding the mechanisms that underlie pasture plant responses to different managements. The need to develop agricultural systems that are both sustainable and economically viable has strengthened interest in reliable animal production from pasture and has emphasised the need to understand how white clover can best be maintained in the grazed sward. Breeders are focusing on meeting the nutritional requirements of the grazing animal and are enjoying increasing success in incorporating new genetic material from plant collections into varieties of grass and clover which are better able to withstand environmental stresses. Economic and environmental considerations have stimulated interest in gaining further insights into the nature of (and the reasons for) the species changes which follow reductions in fertiliser inputs and stocking rates. The possibility of harnessing the preferences of different grazing animals to influence vegetational change is being explored. Soil microbiology and nutrient availability in soils (and their influence on future productive capacity) are also influenced by reduced inputs and are subjects attracting increased interest. This paper discusses current understanding of these topics in the UK and identifies some specific problems that require further study.Key words: Clover, grass, grazing, pasture composition, plant breeding Davies, A. 1998. Recherches pastorales au Royaume-Uni : état actuel des connaissances et perspectives d'avenir. Can. J. Plant Sci. 78: 211-216. Les recherches pastorales au Royaume-Uni s'attachent de plus en plus à améliorer la compréhension des mécanismes sous-jacents du comportement des plantes de pâturage à l'égard des diverses modalités d'exploitation. Le besoin de mettre au point des systèmes culturaux à la fois durables et économiques et économiquement viable a eu pour effet de raffermir l'intérêt pour une production animale fiable au pâturage et d'accentuer entre autre la necessité de comprendre les moyens de garder le trèfle blanc dans le peuplement herbager. Les phytogénétistes s'appliquent à satisfaire les besoins nutritionnels de l'animal à l'herbe et ont enregistré des succès croissants dans l'introduction, dans les nouvelles variétés de graminées et de trèfle, de matériel génétique exogène qui les rend plus à même de résister aux stress environnementaux. Les considérations économiques et écologiques ont eu pour effet de stimuler l'intérêt pour une meilleure connaissance de la nature et des causes des changements de la composition botannique du pâturage, consécutifs aux apports d'engrais chimiques et aux divers taux de chargement animal. On examine les possibilités de mettre à profit les préférences de différentes espèces herbivores pour manipuler l'évolution du couvert prairial. La microbiologie du sol et l'assimilabilité des éléments nutritifs du sol ainsi que leur influence su...

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Recovery after freezing in Avena sativa L., Lolium perenne L. and L. multiflorum Lam.

Cited by 32 publications

References 34 publications

Genetic transformation of lipid transfer protein encoding gene in Phalaenopsis amabilis to enhance cold resistance

Genetic transformation of lipid transfer protein encoding gene in Phalaenopsis amabilis to enhance cold resistance

Low temperature and hardening effects on photosynthetic apparatus efficiency and survival of forage grass varieties

Pasture research in the UK: Present knowledge and future prospects

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