The Apparent Involvement of Polyphenol Oxidase and Phloridzin in the Production of Apple Rooting Cofactors

Bassuk, Nina L.; Hunter, L.D.; Howard, B. H.

doi:10.1080/00221589.1981.11515007

Cited by 30 publications

(11 citation statements)

References 15 publications

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“…Among these, IAA oxidase is a specialized enzyme for IAA decomposition, which influences root growth and development by affecting the level of endogenous IAA. Polyphenol oxidase not only catalyzes the metabolism of IAA but also catalyzes the reaction of phenols with IAA to form rooting cofactors (Bassuk et al, 1981). Peroxidase participates in the catabolism of auxins (Quiroga et al, 2000;Passardi et al, 2004).…”

Section: Effects Of Nitrogen Form On Iaa Catabolic Enzyme Activity Inmentioning

confidence: 99%

“…of auxins (Quiroga et al, 2000;Passardi et al, 2004) and PPO catalyzes the reaction of phenols with IAA to form IAA-phenolic acid complexes, which are widely recognized as rooting cofactors (Bassuk et al, 1981). The endogenous ZR level of sweetpotato storage root is regulated by the class I knotted1-like homeobox (KNOX1), and ZR distribution is similar to the expression patterns of KNOX1 genes (Tanaka et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

“…At harvest, the ammonium N treatment had resulted in the highest storage root yield and storage root number per plant. of auxins (Quiroga et al, 2000;Passardi et al, 2004) and PPO catalyzes the reaction of phenols with IAA to form IAA-phenolic acid complexes, which are widely recognized as rooting cofactors (Bassuk et al, 1981).…”

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confidence: 99%

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Influence of Two Nitrogen Forms on Hormone Metabolism in Potential Storage Roots and Storage Root Number of Sweetpotato

Shi

Liu

et al. 2018

Crop Science

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In this study, we investigated the effects of two N forms on sweetpotato [Ipomoea batatas (L.) Lam.] root growth and development, zeatin riboside (ZR) and indole‐3‐acetic acid (IAA) concentrations in potential storage roots, and storage root number per plant. During the period 2015 to 2016, field experiments were performed using the sweetpotato cultivars ‘Shangshu 19’ and ‘Jixu 23’, which involved the following three treatments: no application of N fertilizer, application of 60 kg N hm−2 ammonium N, and application of 60 kg N hm−2 amide N. Our results indicated that during storage root formation, compared with the control treatment, the ammonium N treatment led to a significantly higher number of thick roots. However, the ammonium N treatment significantly reduced the average diameter of thick roots during early storage root formation and increased the average diameter during late storage root formation. Compared with the control treatment, ammonium N treatment inhibited the expression of Ibkn1, Ibkn2, and SRD1 genes during the early stage of storage root formation and also reduced the activities of IAA oxidase, peroxidase, and polyphenol oxidase enzymes, thereby ultimately reducing the ZR and IAA concentrations in potential storage roots. The opposite pattern was observed during the late stage of storage root formation. During the canopy closure period, compared with the control treatment, ammonium N treatment significantly increased the number of storage roots with diameters of 0.5 to 5.0 cm but decreased the number of storage roots with diameters >5.0 cm. At harvest, the ammonium N treatment had resulted in the highest storage root yield and storage root number per plant.

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Section: Effects Of Nitrogen Form On Iaa Catabolic Enzyme Activity Inmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Influence of Two Nitrogen Forms on Hormone Metabolism in Potential Storage Roots and Storage Root Number of Sweetpotato

Shi

Liu

et al. 2018

Crop Science

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“…O rejuvenescimento pode ser conjugado com o estiolamento (desenvolvimento dos ramos na ausência de luz), pois essa técnica determina a redução do teor de inibidores do enraizamento, especialmente do sistema enzimático AIA-oxidase (Doud & Carlson, 1977) e aumento da atividade da enzima polifenol oxidase (Al Barazi & Schwabe, 1984), a qual provavelmente está envolvida na síntese de um co-fator do enraizamento de estacas de macieira (Bassuk et al, 1981).…”

Section: )unclassified

ESTAQUIA SEMILENHOSA DE Vochysia bifalcata

Danner

Gubert

Tagliani

et al. 2010

RSA

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O objetivo desse trabalho foi verificar o enraizamento de estacas semilenhosas de Vochysia bifalcata (guaricica). As estacas foram preparadas com 12 ± 2 cm de comprimento, 0,3 a 0,6 mm de diâmetro e duas folhas na porção apical com sua área reduzida à metade. Foi utilizado o delineamento experimental inteiramente casualizado, com quatro repetições, em esquema fatorial 4 x 2 (quatro concentrações de AIB: zero, 500, 1000 e 2000 mg dm-3; e com ou sem aplicação de antioxidante PVP40). Cada unidade experimental foi composta por 20 estacas, acondicionadas em tubetes com vermiculita e mantidas em casa de vegetação climatizada por 60 dias. Avaliou-se o percentual de estacas enraizadas, com calos, vivas, mortas, com brotações e que mantiveram as folhas. Não houve enraizamento nem formação de calos de estacas semilenhosas de V. bifalcata. A aplicação de AIB e/ou de PVP não influenciou significativamente a sobrevivência, brotação e manutenção de folhas das estacas. A sobrevivência das estacas foi baixa (média de 19%), demonstrando que as condições fisiológicas das estacas não estavam propícias para o enraizamento. Novos experimentos são necessários, principalmente utilizando o rejuvenescimento das estacas.

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“…It has been shown for various plant systems that carbohydrates [19], and several other endogenous factors [6,7] affect the rooting process . Nevertheless, the search for native rooting promoters, active by themselves or through interaction with auxin, has not been exhausted [1,3,4,6,8,9,18,21,23] .…”

Section: Introductionmentioning

confidence: 99%

Evidence for the presence of a native, non-auxinic rooting promoter in avocado (Persea americana Mill.)

1986

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The presence of a rooting promoter in paratially purified extracts of avocado (Persea amricana Mill.) organs has been demonstrated using the mung bean rooting bioassay . Extraction with 80% methanol was followed by partition into diethyl ether, paper chromatography (PC) and 3 steps of thin layer chromatography (TLC) . The number of roots induced by the rooting promoter in the absence of exogenous auxin was 5 to 7 times higher than that of the water control and 50% higher than by 4-(indol-3-yl) butyric acid (IBA) at its reported optimum concentration. Rooting of tomato, Coleus and young avocado cuttings was also enhanced by the rooting promoter . The rooting promoter was inhibitory in the wheat coleoptile section elongation bioassay for auxins and had slight inhibitory activity in the split pea stem curvature test .The biological properties of the avocado rooting promoter may be comparable to those of a-(p-chlorophenoxy) isobutyric acid (PCIB) which acts as an anti-auxin in certain bioassays and, nevertheless, promotes the rooting of mung bean cuttings.

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The Apparent Involvement of Polyphenol Oxidase and Phloridzin in the Production of Apple Rooting Cofactors

Cited by 30 publications

References 15 publications

Influence of Two Nitrogen Forms on Hormone Metabolism in Potential Storage Roots and Storage Root Number of Sweetpotato

Influence of Two Nitrogen Forms on Hormone Metabolism in Potential Storage Roots and Storage Root Number of Sweetpotato

ESTAQUIA SEMILENHOSA DE Vochysia bifalcata

Evidence for the presence of a native, non-auxinic rooting promoter in avocado (Persea americana Mill.)

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