2017
DOI: 10.26545/b00000x
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Gibberellin and polyamines in plant growth, development, and postharvest senescence of ornamental plants – a review

Abstract: The polyamines, putrescine, spermidine and spermine, are low-molecular weight substances, synthesized in eucariot cells from their immediate precursor, ornithine. The polyamines are found in fruits and vegetables, foods of animal origin and fermented food products. As plant growth regulators, are believed to be involved in several physiological processes. Gibberellins are plant hormones that regulate growth and influence various developmental processes and are derived via the ent-gibberellane skeleton. Gibbere… Show more

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Cited by 7 publications
(8 citation statements)
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“…It has been generally assumed that the trans-geranylgeranyl diphosphate (GGPP) is first converted to ent-kaurene, then to GA12 by ent-kaurene oxidase, and ent-kaurenoic acid oxidase. The GA12 is converted into GA53, which finally produces the biologically active forms that are catalyzed by the oxoglutaratedependent dioxygenases GA3ox (GA 3-oxidase; Amorim et al, 2017). In the growth hormone of plants, brassinosteroid (BR) and photoperiod can regulate the synthesis of the GA and its biological activity.…”
Section: Introductionmentioning
confidence: 99%
“…It has been generally assumed that the trans-geranylgeranyl diphosphate (GGPP) is first converted to ent-kaurene, then to GA12 by ent-kaurene oxidase, and ent-kaurenoic acid oxidase. The GA12 is converted into GA53, which finally produces the biologically active forms that are catalyzed by the oxoglutaratedependent dioxygenases GA3ox (GA 3-oxidase; Amorim et al, 2017). In the growth hormone of plants, brassinosteroid (BR) and photoperiod can regulate the synthesis of the GA and its biological activity.…”
Section: Introductionmentioning
confidence: 99%
“…Postharvest senescence may be due to several factors, such as reactive oxygen species (ROS), presenting as discoloration and petal curvature (Trippi and Paulin, 1984). Many studies involving antioxidant properties were carried out with the aim of increasing longevity of the flowers (Reviewed by Amorim et al, 2017;Panavas and Rubinstein, 1998;Vaslier and Van Doorn, 2003;Gerailoo and Ghasemnezhad, 2011;Fan et al, 2015;Vieira et al, 2016;Fonseca et al, 2017).…”
Section: Introductionmentioning
confidence: 99%
“…Various techniques are employed for floral induction through growth regulators, which allows for a productive increase and prolongs the flowering period. A groups of exogenous regulators with great potential in the production process of commercial flowers are polyamines and gibberellins (Amorim et al, 2017).…”
Section: Introductionmentioning
confidence: 99%
“…In addition, there are strong correlations between cultivar, growth regulator and the environment, which must be taken into account to establish the time and optimum dosage to be applied. In consideration of all these interrelationships, studies that establish safe doses according to the needs of each species for flower production are essential (Liu et al, 2015;Ahmeda et al, 2017;Amorim et al, 2017;).…”
Section: Introductionmentioning
confidence: 99%