The response of cutting position and auxin concentration on rooting and shooting of Araucaria heterophylla

Morphological and proteic modifications in Nicotiana tabacum L. transformed by Agrobacterium rhizogenes were evaluated by the comparison of normal and transformant plants regenerated from hairy-roots formed by the strains A4 or IB-642 of A. rhizogenes. Changes in apical dominance were observed in IB-642 transformants, which exhibited an abnormal development of axiliary buds. The electrophoretic analysis indicated an increase in peroxidase activity and the induction of several isozymes of this complex in the transformants. The SDS-PAGE patterns comparison allows to identify several changes, specially, the increase in 31-33 and 54 kD polypeptides in the transformants.. Biochemical analysis suggests the induction of a pathogen or stress like response of the transformants due to the high auxin concentration codified by A. rhizogenes T-DNA incorporated to the plant genome.

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Histodifferentiation of oil palm somatic embryo development at low auxin concentration

PROTOPLASMA ◽

10.1007/s00709-017-1143-7 ◽

2017 ◽

Vol 255 (1) ◽

pp. 285-295 ◽

Cited By ~ 3

Author(s):

M. S. Pádua ◽

R. S. Santos ◽

C. R. G. Labory ◽

V. C. Stein ◽

E. G. Mendonça ◽

...

Keyword(s):

Somatic Embryo ◽

Embryo Development ◽

Oil Palm ◽

Auxin Concentration ◽

Somatic Embryo Development

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Induction of somatic embryogenesis in soybean: physicochemical factors influencing the development of somatic embryos

Genetics and Molecular Biology ◽

10.1590/s1415-47572000000400027 ◽

2000 ◽

Vol 23 (4) ◽

pp. 865-868 ◽

Cited By ~ 2

Author(s):

Gisele Aparecida Bonacin ◽

Antonio Orlando Di Mauro ◽

Roberto Carlos de Oliveira ◽

Dilermando Perecin

Keyword(s):

Somatic Embryo ◽

Somatic Embryos ◽

Ph Value ◽

Petri Dish ◽

Naphthalene Acetic Acid ◽

Embryo Production ◽

Light Intensities ◽

Immature Cotyledons ◽

Auxin Concentration ◽

Somatic Embryo Production

The embryogenic capability of five soybean cultivars (Renascença, IAS-5, IAC-17, BR-16 and FT-Cometa) was studied at different auxin concentrations (8, 10 and 12 mg/l naphthalene acetic acid, NAA), at different pHs (5.8 and 7.0) and at low (8-12 muEm-2 s-1) and high (27-33 mEm-2 s-1) light intensities. The experimental design was completely randomized with four replications. Immature cotyledons 4-6 mm in length were placed in the six induction mediums evaluated and submitted to two light intensities. Twenty immature cotyledons per cultivar were placed on each Petri dish, which was considered to be one replication. The number of somatic embryos per treatment per replication was counted. The results showed genotype influence on somatic embryogenic capability of each cultivar, with the most embryogenic cultivars being BR-16, FT-Cometa and IAS-5. Auxin concentration and pH value also influenced somatic embryo production, with 10 mg/l NAA being the best auxin concentration and 7.0 the best pH value. The interactions cultivar x auxin, auxin x pH and pH x light were significant, while other double interactions were not. All triple and quadruple interactions were significant, except cultivar x pH x light. No significant differences in somatic embryo production were observed in medium with different pHs or when the Petri dishes containing immature cotyledons were exposed to the two light intensities evaluated. However, a higher number of somatic embryos was produced when the medium pH was adjusted to 7.0.

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The effect of auxin concentration on cytokinin stability and metabolism

Planta ◽

10.1007/bf00394775 ◽

1988 ◽

Vol 174 (2) ◽

pp. 231-234 ◽

Cited By ~ 67

Author(s):

L. M. S. Palni ◽

L. Burch ◽

R. Horgan

Keyword(s):

Auxin Concentration

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Low selenium increases the auxin concentration and enhances tolerance to low phosphorous stress in tobacco

Environmental and Experimental Botany ◽

10.1016/j.envexpbot.2018.05.017 ◽

2018 ◽

Vol 153 ◽

pp. 127-134 ◽

Cited By ~ 17

Author(s):

Hongfang Jia ◽

Zhaopeng Song ◽

Feiyue Wu ◽

Ming Ma ◽

Yiting Li ◽

...

Keyword(s):

Auxin Concentration ◽

Low Selenium

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Calonectria scoparia. [Descriptions of Fungi and Bacteria].

IMI Descriptions of Fungi and Bacteria ◽

10.1079/dfb/20056401174 ◽

1993 ◽

Author(s):

P. W. Crous

Keyword(s):

South Africa ◽

Pisum Sativum ◽

Geographical Distribution ◽

Root Rot ◽

Persea Americana ◽

Damping Off ◽

Araucaria Heterophylla ◽

Splash Dispersal ◽

Shoot Blight ◽

Stem Cankers

Abstract A description is provided for Calonectria scoparia. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Acacia spp. (68, 1566), Araucaria heterophylla, Eucalyptus spp., Fragaria sp., Luma sp., Medicago sativa, M. truncatula, Persea americana, Pinus spp., Pisum sativum, Rhododendron spp., Prunus sp., Syncarpia gummifera. DISEASE: Damping off, root rot, cutting rot, stem cankers, leaf spotting, seedling and shoot blight. GEOGRAPHICAL DISTRIBUTION: Australia, Brazil, India, Kenya, Mauritius, South Africa. TRANSMISSION: Wind and splash dispersal.

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