Ethylene and polyamine production patterns during in vitro shoot organogenesis of two passion fruit species as affected by polyamines and their inhibitor

2009 ◽  
Vol 99 (2) ◽  
pp. 199-208 ◽  
Author(s):  
Leonardo L. C. Dias ◽  
Claudete Santa-Catarina ◽  
Dimas M. Ribeiro ◽  
Raimundo S. Barros ◽  
Eny I. S. Floh ◽  
...  
Keyword(s):  
Shoot Organogenesis ◽  
Passion Fruit ◽  
Fruit Species

scholarly journals High responsiveness in de novo shoot organogenesis induction of Passiflora cristalina (Passifloraceae), a wild Amazonian passion fruit species

2018 ◽  
Vol 54 (2) ◽  
pp. 166-174 ◽  
Author(s):  
Rodrigo Brito de Faria ◽  
Ilio Fealho de Carvalho ◽  
Ana Aparecida Bandini Rossi ◽  
Elyabe Monteiro de Matos ◽  
Diego Ismael Rocha ◽  
...  
Keyword(s):  
De Novo ◽  
Shoot Organogenesis ◽  
Passion Fruit ◽  
Fruit Species ◽  
High Responsiveness

scholarly journals Resistance to Cowpea aphid-borne mosaic virus in in vitro germinated genotypes of Passiflora setacea

2018 ◽  
Vol 40 (1) ◽  
Author(s):  
NAYARA NIELE SACOMAN ◽  
ALEXANDRE PIO VIANA ◽  
VIRGINIA SILVA CARVALHO ◽  
EILEEN AZEVEDO SANTOS ◽  
ROSANA RODRIGUES
Keyword(s):  
Mosaic Virus ◽  
Elisa Test ◽  
Passion Fruit ◽  
The Other ◽  
Visual Evaluation ◽  
Breeding Programs ◽  
Genetic Breeding ◽  
Fruit Species ◽  
Cowpea Aphid

ABSTRACT Passion fruit (Passiflora edulis) is a fruit species of great relevance for Brazilian economy. However, it is highly susceptible to the Cowpea aphid-borne mosaic virus (CABMV). The species P.setacea, on the other hand, is resistant to the disease. The present study aimed to identify CABMV-resistant P. setacea genotypes for the introgression of genes into sour passion fruit genetic breeding programs. The seeds of passion fruit genotypes were germinated in vitro in MS culture medium. The seedlings were acclimatized in a growth chamber at the temperature of 27 ± 2ºC, photoperiod of 16:8 hours and 80% of relative humidity. Thirty plants of each genotype were mechanically inoculated with extract prepared from leaves collected from passion fruit plants with symptoms of CABMV for the assessment of resistance to CABMV. The severity of leaf symptoms was evaluated by means of a grading scale of visual signs. After the visual evaluation and identification of the asymptomatic genotypes of P. setacea, the PTA-ELISA test was carried out for 30 selected genotypes. According to the visual evaluation, all P. setacea genotypes were highly resistant to CABMV, while the P. edulis genotypes were highly susceptible. Out of the 30 genotypes selected, only PsRJ 4 was considered susceptible by PTA-ELISA. The other genotypes of P. setacea were considered resistant and present great potential for use in passion fruit genetic breeding programs.

scholarly journals Natural Variation in Plant Pluripotency and Regeneration

Plants ◽  
2020 ◽  
Vol 9 (10) ◽  
pp. 1261
Author(s):  
Robin Lardon ◽  
Danny Geelen
Keyword(s):  
De Novo ◽  
Shoot Organogenesis ◽  
In Vitro Regeneration ◽  
Relative Role ◽  
Root Explants ◽  
Experimental Systems ◽  
Complex Process ◽  
Insight Into ◽  
Molecular Framework

Plant regeneration is essential for survival upon wounding and is, hence, considered to be a strong natural selective trait. The capacity of plant tissues to regenerate in vitro, however, varies substantially between and within species and depends on the applied incubation conditions. Insight into the genetic factors underlying this variation may help to improve numerous biotechnological applications that exploit in vitro regeneration. Here, we review the state of the art on the molecular framework of de novo shoot organogenesis from root explants in Arabidopsis, which is a complex process controlled by multiple quantitative trait loci of various effect sizes. Two types of factors are distinguished that contribute to natural regenerative variation: master regulators that are conserved in all experimental systems (e.g., WUSCHEL and related homeobox genes) and conditional regulators whose relative role depends on the explant and the incubation settings. We further elaborate on epigenetic variation and protocol variables that likely contribute to differential explant responsivity within species and conclude that in vitro shoot organogenesis occurs at the intersection between (epi) genetics, endogenous hormone levels, and environmental influences.

scholarly journals Evaluation of different methods to overcome in vitro seed dormancy from yellow passion fruit

2014 ◽  
Vol 13 (36) ◽  
pp. 3657-3665 ◽  
Author(s):  
M. M. Rego, ◽  
E. R. Rego, ◽  
L. P. U. Nattrodt, ◽  
P. A. Barroso, ◽  
F. L. Finger, ◽  
...  
Keyword(s):  
Seed Dormancy ◽  
Passion Fruit ◽  
Yellow Passion Fruit

scholarly journals Rhizogenesis in in vitro shoot cultures of passion fruit (Passiflora edulis f. flavicarpa Deg.) is affected by ethylene precursor and by inhibitors

2001 ◽  
Vol 7 (1) ◽  
Author(s):  
W. M. Marota ◽  
W. C. Otoni ◽  
M. Carnelossi ◽  
E. Silva ◽  
A. A. Azevedo ◽  
...  
Keyword(s):  
Ethylene Production ◽  
Time Course ◽  
Root Formation ◽  
Callus Formation ◽  
Passion Fruit ◽  
Shoot Cultures ◽  
Ethylene Inhibitors ◽  
Beneficial Effects ◽  
Ethylene Precursor

The effects of the ethylene precursor ACC and two inhibitors, AgNO3 and AVG, on root formation were tested in in vitro shoots of passion fruit (Passiflora Midis f.flavicalpa Deg.). The organogenic response was assessed on the basis of percentage of shoot-forming. roots, root number and length. The time course of ethylene production was also monitored. ACC inhibited root formation by delaying root emergence and increasine, callus formation at the basis of the shoots. In addition, ACC caused a marked increase in ethylene production, coupled to leaf chlorosis and senescence with lower rooting frequencies, number and length of roots. IAA supplementation increased ethylene production. Both ethylene inhibitors, AgNO3 and AVG, at appropriate concentrations reduced callus formation at the basis of shoots. AVG increased the number of roots per shoot, but drastically reduced length of differentiated roots. Regarding to leaf pigments, ACC promoted a marked reduction on carotenoids and total chlorophyll, whereas AVG and AgNO3 delayed explant senescence and pigments degradation, not differing from IAA supplemented and non-supplemented control treatments. The results confirm previous reports on the beneficial effects of ethylene inhibitors on in vitro rooting and suggest its reliability to be used as an alternative approach to evaluate sensitivity of Passiflora species to ethylene.  

scholarly journals Agronomic descriptors and ornamental potential of passion fruit species

2017 ◽  
Vol 23 (3) ◽  
pp. 357
Author(s):  
Daiane Da Silva Nóbrega ◽  
José Ricardo Peixoto ◽  
Michelle Souza Vilela ◽  
Fábio Gelape Faleiro ◽  
Karolline De Paula Silva Gomes ◽  
...  
Keyword(s):  
Block Design ◽  
Digital Camera ◽  
Passion Fruit ◽  
Fruit Breeding ◽  
Fruit Species ◽  
Morphological Aspects ◽  
Randomized Block Design ◽  
Distrito Federal ◽  
The University ◽  
Two Hybrid

Brazil has great variability, being one of the centers of origin of the genus Passiflora. Passion fruit has a multiple and diversified uses, being little explored as an ornamental plant in the country. The objective of this work was to characterize four passion fruit genotypes (two hybrid materials from the experimental field of passion fruit breeding program of the University of Brasília, and two passion fruit cultivars - BRS Sertão Forte and BRS Mel do Cerrado, both of them from Brazil), based on official and validated morphoagronomic descriptors for the identification of morphological aspects and ornamental potential, under field conditions, in the Distrito Federal, Brazil. The experiment consisted of a randomized block design, with four treatments, four replications, and six plants per plot. Plants were analyzed weekly regarding the characteristics of the branches, leaf blade, petiole, and flowers, with 24 measurements of each structure in the four treatments, which were recorded using a digital camera. Flowers presented pronounced size and color, colored branches, and leaves of varying sizes and shapes. All materials studied showed commercial ornamental potential to be explored as new options for ornamental climbing plants. 

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