Changes in endogenous abscisic acid and soluble sugars levels during dormancy-release in bulbs of Lilium rubellum

Xu, Rong-Yan; Niimi, Yoshiji; Han, Dongsheng

doi:10.1016/j.scienta.2006.08.004

Cited by 41 publications

(27 citation statements)

References 25 publications

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“…Sprouting behaviour of Lilium bulblets cultivated under low temperature conditions showed rapid starch hydrolysis accompanied by accumulation of sugars (Miller and Langhans, 1990). The accumulation of sugars could influence the sprouting and bud growth in tubers (Xu et al, 2006). The protein content was highly increased due to TDM treatment in both basal and apical regions of white yam tubers on 15, 30 and 45 DAS (Fig.2a).…”

Section: Resultsmentioning

confidence: 99%

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Changes in biochemical constituents and induction of early sprouting by triadimefon treatment in white yam (Dioscorea rotundata Poir.) tubers during storage

Jaleel

Gopi

Manivannan

et al. 2007

J. Zhejiang Univ. - Sci. B

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Abstract:The ability of triadimefon (TDM), a triazolic fungicide, to alter the biochemical constituents and thereby minimizing the days required for sprouting in white yam (Dioscorea rotundata Poir.) tubers during storage under (30±2) °C in the dark, was studied. TDM at 20 mg/L was given to tubers by dipping the tubers in treatment solution containing 20 mg/L TDM on 10, 25 and 40 d after storage (DAS). Starch, sugars, protein, amino acid contents as well as protease and α-amylase activities were estimated on 15, 30 and 45 DAS from two physiological regions viz., apical and basal regions of the tubers. In normal conditions (control) sprouting occurred on 70 to 80 DAS. The starch content decreased, while protein, amino acid, sugar contents and protease and α-amylase activities were increased due to TDM treatment and led to early sprouting.

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Section: Resultsmentioning

confidence: 99%

“…These reports show clearly that if GA content of tubers is decreased and ABA content increased, the sprouting process can be initiated in tubers. Some unknown factors other than ABA might also be involved in dormancy-release in tubers (Xu et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Changes in biochemical constituents and induction of early sprouting by triadimefon treatment in white yam (Dioscorea rotundata Poir.) tubers during storage

Jaleel

Gopi

Manivannan

et al. 2007

J. Zhejiang Univ. - Sci. B

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“…O tempo de seis horas após o enriquecimento pode ser considerado como um pequeno intervalo de tempo, porém foi suficiente para a observação da translocação na figueira cultivada com quatro ramos nas condições brasileiras, corroborando o encontrado por Simkhada et al (2007) para o caqui. Plantas de clima temperado seguem padrões específicos de deposição e uso de carboidratos por toda planta de acordo com a estação (Kramer & Kozlowski, 1979;Xu et al, 2006). Esses padrões são modificados segundo as espécies (Loescher et al,1990).…”

Section: Resultsunclassified

Alocação de fotoassimilados marcados e relação fonte-dreno em figueiras cv. Roxo de Valinhos. 2. Tempo de alocação

Silva

Leonel

Souza

et al. 2011

Agraria

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Alocação de fotoassimilados marcados e relação fonte-dreno em figueiras cv. Roxo de Valinhos. 2. Tempo de alocação RESUMOEste trabalho foi realizado para avaliar a translocação e o tempo de alocação dos fotoassimilados, utilizandose o marcador carbono-13, em plantas no estádio reprodutivo da espécie Ficus carica L. cv. Roxo de Valinhos. Uma folha considerada adulta foi enriquecida com 13 CO 2 por 30 minutos em atmosfera controlada e as respectivas plantas foram arrancadas após 6, 24, 48, 72, 120, 168 e 360 horas de enriquecimento. Após estes períodos foram avaliadas as partes das plantas (meristema apical, folhas, ramos, caule e sistema radicular) para a caracterização isotópica natural e do enriquecimento em espectrômetro de massas de razão isotópica. Naturalmente, a planta apresentou valores de enriquecimento relativo de δ 13 C -27,92‰ (referência isotópica). A planta apresentou crescimento vegetativo e fase reprodutiva concomitantes, existindo predominância na alocação de 13 C nas partes meristemáticas, seguidas pelos órgãos reprodutivos, sendo o sistema radicular o principal órgão de reserva. Palavras-chave:Ficus carica L., isótopo estável, reservas de carboidratos, translocação de 13 C. Allocation of marked photoassimilated and sourcesink dynamics in fig trees cv. Roxo de Valinhos. 2. Allocation time ABSTRACTThe work evaluated the translocation and allocation period of the photosynthates, using the carbon-13 stable marker, in Ficus carica L. cv. Roxo de Valinhos plants in the reproductive stage. A fig tree leaf considered adult was enriched with 13 CO 2 for 30 minutes in a controlled atmosphere and the respective plants were collected after 6, 24, 48, 72, 120, 168 and 360 hours of enrichment. After the specified times, the plants parts (apical meristem, leaves, shoots, stem and root system) were evaluated to characterize the natural and enrichment isotopes in a mass spectrometer of isotopic reason. Naturally, the plant presented values of relative enrichment of δ 13 C -27.92‰ (isotopic reference). The plant presented concomitant vegetative growth and reproductive stage, showing predominance in the 13 C allocation in the meristems areas, followed by the reproductive organs, having the root system as the main reserve organ.

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“…These experiments have shown that the process is affected by many complicated factors. However, because in vitro methods do not provide continuous monitoring, the exact mechanism of lily bulb development is still unclear [1][2][3][4][5][6][7]. Magnetic resonance imaging (MRI) enables non-invasive, longitudinal assessment of the water status of localized tissues [8][9][10].…”

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confidence: 99%

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confidence: 99%

MRI can reveal metabolic changes in lily bulbs in vivo during dormancy release

Han

2012

Sci. China Life Sci.

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The factors influencing dormancy release in lily bulbs strongly affect commercialization success, but the mechanism of dormancy release is still unclear. Magnetic resonance imaging (MRI) can detect changes in morphology and water status in a living plant bulb and aid in investigating release factors. To evaluate whether MRI could be used to detect intra-bulb metabolic changes during the dormant period in Oriental Lilies (Lilium 'Sorbonne'), a series of MRI and sugar concentration measurements were performed weekly on bulbs stored for 11 weeks at 4°C. The image quality of intra-bulb structure obtained using T 1 -weighted imaging was superior to that obtained using T 2 -weighted imaging and had a higher signal-to-noise ratio (0.97±0.01). Magnetization transfer ratio values for the bud and basal plate declined during the first eight weeks of cold storage (P>0.05), and were well correlated with concentration of soluble sugar in the bud (R 2 =0.95) and basal plate (R 2 =0.93). Thus, MRI can serve as a valuable tool for observation and analysis of dynamic morphological and metabolic changes in vivo during dormancy release. This information is potentially useful as a guide in the improvement of horticultural product quality. Dormancy release in Oriental Lilies, which are perennial plants, generally requires a minimum of eight weeks at low temperatures (4°C). Traditional in vitro methods can detect morphological and metabolic changes in lily bulbs at certain time points, which can then be verified by blocking development. These experiments have shown that the process is affected by many complicated factors. However, because in vitro methods do not provide continuous monitoring, the exact mechanism of lily bulb development is still unclear [1][2][3][4][5][6][7]. Magnetic resonance imaging (MRI) enables non-invasive, longitudinal assessment of the water status of localized tissues [8][9][10]. It has been used to study water status of flower bulbs, providing insight into bulb development [11,12], and to investigate disorders such as bud abortion [13]. In plant studies, spin-lattice relaxation time (T 1 ) and spin-spin relaxation time (T 2 ) are often used as indicators of water status as they are primarily correlated with water content and mobility [14][15][16]. In addition, the magnetization transfer effect is applied to quantitatively measure the amount of magnetization transfer from bound to free water in living plant tissues [17].We searched for the optimal MRI sequence for morphology monitoring and changes in water correlation coefficients. Dynamic changes in T 1 , T 2 parameters and magnetization transfer ratio (MTR) were summarized during lily bulb dormancy break, and correlations between water molecule relaxation, soluble sugar, and starch were investigated.

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Changes in endogenous abscisic acid and soluble sugars levels during dormancy-release in bulbs of Lilium rubellum

Cited by 41 publications

References 25 publications

Changes in biochemical constituents and induction of early sprouting by triadimefon treatment in white yam (Dioscorea rotundata Poir.) tubers during storage

Changes in biochemical constituents and induction of early sprouting by triadimefon treatment in white yam (Dioscorea rotundata Poir.) tubers during storage

Alocação de fotoassimilados marcados e relação fonte-dreno em figueiras cv. Roxo de Valinhos. 2. Tempo de alocação

MRI can reveal metabolic changes in lily bulbs in vivo during dormancy release

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