Effects of phosphonate and salicylic acid treatments on anthracnose disease development and ripening of 'Kensington Pride' mango fruit

2001 ◽  
Vol 41 (6) ◽  
pp. 805 ◽  
Author(s):  
Zainuri ◽  
D. C. Joyce ◽  
H. Wearing ◽  
L. Coates ◽  
L. Terry
Keyword(s):  
Salicylic Acid ◽  
Disease Severity ◽  
Fungal Pathogen ◽  
Colletotrichum Gloeosporioides ◽  
Mangifera Indica ◽  
Fruit Colour ◽  
Salicylic Acid Treatment ◽  
Mango Fruit ◽  
Anthracnose Disease ◽  
Fruit Skin

This study investigated treatment of mango (Mangifera indica L.) fruit with 2 host defence-promoting compounds for suppression of anthracnose disease (Colletotrichum gloeosporioides). Cultivar ‘Kensington Pride’ fruit were treated at concentrations of up to 1000 mg/L with either potassium phosphonate or salicylic acid. Applications were by various combinations of pre- and postharvest dips and vacuum infiltration. Postharvest treatments at up to 2000 mg/L salicylic acid were evaluated in a second fruiting season. Fruit were either uninoculated or inoculated with the fungal pathogen. Colour, firmness and disease-severity were assessed during shelf life at 23°C. There were no significant (P&gt;0.05) effects of potassium phosphonate or salicylic acid on anthracnose disease severity in the first season. Moreover, phosphonate or salicylic acid treatment did not significantly affect fruit colour or firmness changes. There were significant (P&lt;0.05) reductions in anthracnose severity in the second season, especially at the highest concentration of 2000 mg/L salicylic acid. Mango fruit skin colour and firmness changes were also slowed down significantly (P<0.05). These effects of salicylic acid were attributed to inhibition of mango fruit skin ripening (senescence).

scholarly journals Induced defense response in red mango fruit against Colletotrichum gloeosporioides

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Pradeep Kumar Sudheeran ◽  
Noa Sela ◽  
Mira Carmeli-Weissberg ◽  
Rinat Ovadia ◽  
Sayantan Panda ◽  
...  
Keyword(s):  
Induced Resistance ◽  
Fungal Pathogen ◽  
Colletotrichum Gloeosporioides ◽  
Induced Defense ◽  
Rna Seq ◽  
Biotic And Abiotic Stresses ◽  
Mango Fruit ◽  
Green Fruit ◽  
Fruit Skin ◽  
Low Levels

AbstractMango fruit exposed to sunlight develops red skin and are more resistant to biotic and abiotic stresses. Here we show that harvested red mango fruit that was exposed to sunlight at the orchard is more resistant than green fruit to Colletotrichum gloeosporioides. LCMS analysis showed high amounts of antifungal compounds, as glycosylated flavonols, glycosylated anthocyanins, and mangiferin in red vs. green mango skin, correlated with higher antioxidant and lower ROS. However, also the green side of red mango fruit that has low levels of flavonoids was resistant, indicated induced resistance. Transcriptomes of red and green fruit inoculated on their red and green sides with C. gloeosporioides were analyzed. Overall, in red fruit skin, 2,187 genes were upregulated in response to C. gloeosporioides. On the green side of red mango, upregulation of 22 transcription factors and 33 signaling-related transcripts indicated induced resistance. The RNA-Seq analysis suggests that resistance of the whole red fruit involved upregulation of ethylene, brassinosteroid, and phenylpropanoid pathways. To conclude, red fruit resistance to fungal pathogen was related to both flavonoid toxicity and primed resistance of fruit that was exposed to light at the orchard.

scholarly journals Extent of variability in fruit morphological characters of local mango germplasm

2021 ◽  
Vol 9 (3) ◽  
Author(s):  
Gurbir Singh ◽  
Sukhdev Singh
Keyword(s):  
Mangifera Indica ◽  
Morphological Characters ◽  
Fruit Shape ◽  
Fruit Colour ◽  
Light Yellow ◽  
Greenish Yellow ◽  
Orange Yellow ◽  
Fruit Skin ◽  
Yellow Orange ◽  
Medium Type

  A study was conducted on twenty five genotypes of seedling Mangoes to examine fruit morphological characters. Fruit shape of the evaluated germplasm varied enormously and fruits of obovoid, elliptic, round and oblong shapes were found. Fruit apex shape in the evaluated plants was round, acute and obtuse. Depth of fruit stalk cavity was either absent, shallow and of medium type, whereas, fruit neck prominence was absent to slightly prominent in the tested plants. Shape of fruit ventral shoulder was varied and found to be slopping abruptly, rising and then rounded and long curve type in the evaluated germplasm. Fruit beak varies from pointed to perceptible type and fruit sinus was absent to shallow type in the fruits from different plants. Fruit attractiveness varies from very good to excellent and fruit colour from greenish yellow to green colour of fruit skin at maturity was noted in fruits from selected trees. Peel colour of AA-15 was different amongst all the genotypes which were green with red blush. Pulp colour varied from light orange, yellow orange, orange yellow, yellow and light yellow, whereas, pulp texture was soft to intermediate in the evaluated germplasm. Key words: Mangifera indica; Genotype susceptibility; Punjab; India.  

Extent of variability in fruit morphological characters of local mango germplasm

2021 ◽  
Vol 8 (4) ◽  
Author(s):  
Gurbir Singh ◽  
Dr. Sukhdev Singh
Keyword(s):  
Mangifera Indica ◽  
Morphological Characters ◽  
Fruit Shape ◽  
Fruit Colour ◽  
Light Yellow ◽  
Greenish Yellow ◽  
Orange Yellow ◽  
Fruit Skin ◽  
Yellow Orange ◽  
Medium Type

 A study was conducted on twenty five genotypes of seedling Mangoes to examine fruit morphological characters. Fruit shape of the evaluated germplasm varied enormously and fruits of obovoid, elliptic, round and oblong shapes were found. Fruit apex shape in the evaluated plants was round, acute and obtuse. Depth of fruit stalk cavity was either absent, shallow and of medium type, whereas, fruit neck prominence was absent to slightly prominent in the tested plants. Shape of fruit ventral shoulder was varied and found to be slopping abruptly, rising and then rounded and long curve type in the evaluated germplasm. Fruit beak varies from pointed to perceptible type and fruit sinus was absent to shallow type in the fruits from different plants. Fruit attractiveness varies from very good to excellent and fruit colour from greenish yellow to green colour of fruit skin at maturity was noted in fruits from selected trees. Peel colour of AA-15 was different amongst all the genotypes which were green with red blush. Pulp colour varied from light orange, yellow orange, orange yellow, yellow and light yellow, whereas, pulp texture was soft to intermediate in the evaluated germplasm. Key words: Mangifera indica; Genotype susceptibility; Punjab; India.

scholarly journals THE POTENCY OF CALABUR TREE (Muntingia calabura) LEAF EXTRACT TO CONTROL ANTHRACNOSE OF PAPAYA FRUIT

2020 ◽  
Vol 20 (1) ◽  
pp. 37-45
Author(s):  
Efri Efri ◽  
Titik Nur Aeny ◽  
Ivayani Ivayani ◽  
Meisroyatul Hulfa
Keyword(s):  
Incubation Period ◽  
Disease Severity ◽  
Leaf Extract ◽  
Colletotrichum Gloeosporioides ◽  
Disease Development ◽  
Anthracnose Disease ◽  
Nested Design ◽  
Tree Leaf ◽  
Muntingia Calabura ◽  
Concentration Levels

The potency of calabur tree (Muntingia calabura) leaf extract to control anthracnose of papaya fruit. The papaya anthracnose caused by Colletotrichum gloeosporioides is one of the factors causing a decrease in papaya production. The research aimed to determine the abilty of calabur tree leaf extract in inhibiting growth, sporulation, and viability of C. gloeosporioides as well as incubation period and disease severity on the fruit of papaya. The experiment was arranged in a nested design, the concentrations (0, 10, 20, 30, 40, 50, and 60%) were nested within the calabur tree leaf extract methods (boiling and fractionation). The results showed that boiled calabur leaves extract was more effective than fractionated calabur leaves extract to inhibit growth of C. gloeosporioides. Boiled calabur leaves extract and fractionated leaves extract at various concentration showed capability to inhibit the growth, sporulation and viability of C. gloeosporioides. Boiled calabur leaves extract at different concentration levels were able to suppress disease development of papaya anthracnose disease on papaya fruit. The higher concentration of calabur leaves extract, are more effective to inhibit C. gloeosporioides.

scholarly journals Improving the Biocontrol Potential of Bacterial Antagonists with Salicylic Acid against Brown Rot Disease and Impact on Nectarine Fruits Quality

Agronomy ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 209
Author(s):  
Nadia Lyousfi ◽  
Rachid Lahlali ◽  
Chaimaa Letrib ◽  
Zineb Belabess ◽  
Rachida Ouaabou ◽  
...  
Keyword(s):  
Salicylic Acid ◽  
Disease Severity ◽  
Mycelial Growth ◽  
Brown Rot ◽  
Antagonistic Bacteria ◽  
Biological Treatments ◽  
Rot Disease ◽  
The Impact

The main objective of this study was to evaluate the ability of both antagonistic bacteria Bacillus amyloliquefaciens (SF14) and Alcaligenes faecalis (ACBC1) used in combination with salicylic acid (SA) to effectively control brown rot disease caused by Monilinia fructigena. Four concentrations of salicylic acid (0.5%, 2%, 3.5%, and 5%) were tested under in vitro and in vivo conditions. Furthermore, the impact of biological treatments on nectarine fruit parameters’ quality, in particular, weight loss, titratable acidity, and soluble solids content, was evaluated. Regardless of the bacterium, the results indicated that all combined treatments displayed a strong inhibitory effect on the mycelial growth of M. fructigena and disease severity. Interestingly, all SA concentrations significantly improved the biocontrol activity of each antagonist. The mycelial growth inhibition rate ranged from 9.79% to 88.02% with the highest reduction rate recorded for bacterial antagonists in combination with SA at both concentrations of 0.5% and 3.5%. The in vivo results confirmed the in vitro results with a disease severity varying from 0.00% to 51.91%. A significant biocontrol improvement was obtained with both antagonistic bacteria when used in combination with SA at concentrations of 0.5% and 2%. The lowest disease severity observed with ACBC1 compared with SF14 is likely due to a rapid adaptation and increase of antagonistic bacteria population in wounded sites. The impact of all biological treatments revealed moderate significant changes in the fruit quality parameters with weight loss for several treatments. These results suggest that the improved disease control of both antagonistic bacteria was more likely directly linked to both the inhibitory effects of SA on pathogen growth and induced fruit resistance.

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