Polyamine contents, ethylene synthesis, and BrACO2 expression during turnip germination

Puga, María Isabel; Gallardo, Mercedes; Rodríguez-Gacio, M.C.; Matilla, Ángel J.

doi:10.1007/s10535-006-0090-5

Cited by 14 publications

(5 citation statements)

References 40 publications

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“…Spd content (free as well as other forms) was higher throughout the germination process (imbibition and metabolism activation phases) in both primed and unprimed variants as compared to Put and Spm ( Supplementary Table S1 ). These results are in line with those observed in Arabidopsis thaliana , Malus domestica , Cedrela fissilis , and sweet corn, where Spd content was also higher than other PAs [ 37 , 38 , 39 , 40 ]. In Arabidopsis , the addition of exogenous Put (but not Spd or Spm) resulted in the inhibition of germination [ 41 ], which suggests the function of Put in the regulation of germination.…”

Section: Discussionsupporting

confidence: 91%

Endogenous Polyamines and Ethylene Biosynthesis in Relation to Germination of Osmoprimed Brassica napus Seeds under Salt Stress

Lechowska

Wojtyla

Quinet

et al. 2021

IJMS

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Currently, seed priming is reported as an efficient and low-cost approach to increase crop yield, which could not only promote seed germination and improve plant growth state but also increase abiotic stress tolerance. Salinity represents one of the most significant abiotic stresses that alters multiple processes in plants. The accumulation of polyamines (PAs) in response to salt stress is one of the most remarkable plant metabolic responses. This paper examined the effect of osmopriming on endogenous polyamine metabolism at the germination and early seedling development of Brassica napus in relation to salinity tolerance. Free, conjugated and bound polyamines were analyzed, and changes in their accumulation were discussed with literature data. The most remarkable differences between the corresponding osmoprimed and unprimed seeds were visible in the free (spermine) and conjugated (putrescine, spermidine) fractions. The arginine decarboxylase pathway seems to be responsible for the accumulation of PAs in primed seeds. The obvious impact of seed priming on tyramine accumulation was also demonstrated. Moreover, the level of ethylene increased considerably in seedlings issued from primed seeds exposed to salt stress. It can be concluded that the polyamines are involved in creating the beneficial effect of osmopriming on germination and early growth of Brassica napus seedlings under saline conditions through moderate changes in their biosynthesis and accumulation.

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Section: Discussionsupporting

confidence: 91%

Endogenous Polyamines and Ethylene Biosynthesis in Relation to Germination of Osmoprimed Brassica napus Seeds under Salt Stress

Lechowska

Wojtyla

Quinet

et al. 2021

IJMS

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“…Seed dormancy in A. platanoides (Szczotka and Lewandowska, 1989) was broken by exogenous application of Spm. Total amounts of free and conjugated PAs increased during imbibition and decreased from radicle protrusion onwards in chick-pea seeds (Gallardo et al, 1992), as well as Brassica rapa (Puga-Hermida et al, 2006) and Picea abies (Gemperlová et al, 2009). A recent study demonstrated that inhibition of an intermediate compound at the methionine cycle alters PA levels, and impairs seedling growth and reproduction in arabidopsis (Bürstenbinder et al, 2010).…”

Section: Discussionmentioning

confidence: 99%

Polyamines, IAA and ABA during germination in two recalcitrant seeds: Araucaria angustifolia (Gymnosperm) and Ocotea odorifera (Angiosperm)

et al. 2011

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The (Spd + Spm) : Put ratio could be used as a marker for germination completion. The increase in IAA levels, prior to germination, could be associated with variations in PA content. The ABA mobilization observed in the embryos could represent a greater resistance to this hormone in recalcitrant seeds, in comparison to orthodox seeds, opening a new perspective for studies on the effects of this regulator in recalcitrant seeds. The gymnosperm seed, though without a connective tissue between megagametophyte and embryo, seems to be able to maintain communication between the tissues, based on the likely transport of plant growth regulators.

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“…S-Adenosylmethionine, a substrate for ACS activity is also a component of other important physiological pathways, e.g., polyamine biosynthesis (Puga-Hermida et al 2006;Matilla and Matilla-Vazquez 2008). Activity of enzymes responsible for methionine and SAM synthesis in seeds was detected mainly during terminal phase of germination deWned by radical protrusion (Gallardo et al 2000).…”

Section: Discussionmentioning

confidence: 99%

Dormancy removal in apple embryos by nitric oxide or cyanide involves modifications in ethylene biosynthetic pathway

Gniazdowska

Krasuska

Bogatek

2010

Planta

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The connection between classical phytohormone-ethylene and two signaling molecules, nitric oxide (NO) and hydrogen cyanide (HCN), was investigated in dormancy removal and germination "sensu stricto" of apple (Malus domestica Borkh.) embryos. Deep dormancy of apple embryos was removed by short-term (3-6 h) pre-treatment with NO or HCN. NO- or HCN-mediated stimulation of germination was associated with enhanced emission of ethylene by the embryos, coupled with transient increase in ROS concentration in embryos. Ethylene vapors stimulated germination of dormant apple embryos and eliminated morphological anomalies characteristic for young seedlings developed from dormant embryos. Inhibitors of ethylene receptors completely impeded beneficial effect of NO and HCN on embryo germination. NO- and HCN-induced ethylene emission by apple embryo was only slightly reduced by inhibitor of 1-aminocyclopropane-1-carboxylic acid (ACC) oxidase activity during first 4 days of germination. Short-term pre-treatment of the embryos with NO and HCN modified activity of both key enzymes of ethylene biosynthetic pathway: ACC synthase and ACC oxidase. Activity of ACC synthase declined during first 4 days of germination, while activity of ACC oxidase increased markedly at that time. Additional experiments point to non-enzymatic conversion of ACC to ethylene in the presence of ROS (H(2)O(2)). The results indicate that NO and HCN may alleviate dormancy of apple embryos "via" transient accumulation of ROS, leading to enhanced ethylene emission which is required to terminate germination "sensu stricto". Therefore, ethylene seems to be a trigger factor in control of apple embryo dormancy removal and germination.

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Polyamine contents, ethylene synthesis, and BrACO2 expression during turnip germination

Cited by 14 publications

References 40 publications

Endogenous Polyamines and Ethylene Biosynthesis in Relation to Germination of Osmoprimed Brassica napus Seeds under Salt Stress

Endogenous Polyamines and Ethylene Biosynthesis in Relation to Germination of Osmoprimed Brassica napus Seeds under Salt Stress

Polyamines, IAA and ABA during germination in two recalcitrant seeds: Araucaria angustifolia (Gymnosperm) and Ocotea odorifera (Angiosperm)

Dormancy removal in apple embryos by nitric oxide or cyanide involves modifications in ethylene biosynthetic pathway

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