Defensive Mechanisms in Cucurbits against Melon Fly (<i>Bactrocera cucurbitae</i>) Infestation through Excessive Production of Defensive Enzymes and Antioxidants
Melon fly (<i>Bactrocera cucurbitae</i>) is the most common pest of cucurbits, and it directly causes damage to cucurbit fruits in the early developmental stage. The infection of fruit tissues induces oxidative damage through increased generation of cellular reactive oxygen species. The...
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oai:doaj.org-article:e53adee615a74ee39f71cb58b19af56b2021-11-11T18:22:40ZDefensive Mechanisms in Cucurbits against Melon Fly (<i>Bactrocera cucurbitae</i>) Infestation through Excessive Production of Defensive Enzymes and Antioxidants10.3390/molecules262163451420-3049https://doaj.org/article/e53adee615a74ee39f71cb58b19af56b2021-10-01T00:00:00Zhttps://www.mdpi.com/1420-3049/26/21/6345https://doaj.org/toc/1420-3049Melon fly (<i>Bactrocera cucurbitae</i>) is the most common pest of cucurbits, and it directly causes damage to cucurbit fruits in the early developmental stage. The infection of fruit tissues induces oxidative damage through increased generation of cellular reactive oxygen species. The effects of melon fly infestation on the production of defensive enzymes and antioxidant capabilities in five cucurbit species, namely, bottle gourd, chayote, cucumber, snake gourd, and bitter gourd, were investigated in this study. The total phenolic and flavonoid content was considerably higher in melon fly infestation tissues compared to healthy and apparently healthy tissues. The chayote and bottle gourd tissues expressed almost 1.5- to 2-fold higher phenolic and flavonoid contents compared to the tissues of bitter gourd, snake gourd, and cucumber upon infestation. Defensive enzymes, such as peroxidase (POD), superoxide dismutase (SOD), polyphenol oxidase (PPO), and catalase (CAT), were high in healthy and infected tissues of chayote and bottle gourd compared to bitter gourd, snake gourd, and cucumber. The activity of POD (60–80%), SOD (30–35%), PPO (70–75%), and CAT (40–50%) were high in infected chayote and bottle gourd tissue, representing resistance against infestation, while bitter gourd, snake gourd, and cucumber exhibited comparatively lower activity suggesting susceptibility to melon fly infection. The antioxidant properties were also high in the resistant cucurbits compared to the susceptible cucurbits. The current research has enlightened the importance of redox-regulatory pathways involving ROS neutralization through infection-induced antioxidative enzymes in host cucurbit resistance. The melon fly infestation depicts the possible induction of pathways that upregulate the production of defensive enzymes and antioxidants as a defensive strategy against melon fly infestation in resistant cucurbits.Madhusudana SomegowdaS. RaghavendraShankarappa SridharaAchur. N. RajeshwaraSiddanakoppalu. N. PramodS. ShivashankarFeng LinTarek K Zin El-AbedinShabir Hussain WaniHosam O. ElansaryMDPI AGarticlemelon flyROSantioxidantdefensive enzymesphenols and flavonoidssuperoxide dismutaseOrganic chemistryQD241-441ENMolecules, Vol 26, Iss 6345, p 6345 (2021) |
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melon fly ROS antioxidant defensive enzymes phenols and flavonoids superoxide dismutase Organic chemistry QD241-441 |
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melon fly ROS antioxidant defensive enzymes phenols and flavonoids superoxide dismutase Organic chemistry QD241-441 Madhusudana Somegowda S. Raghavendra Shankarappa Sridhara Achur. N. Rajeshwara Siddanakoppalu. N. Pramod S. Shivashankar Feng Lin Tarek K Zin El-Abedin Shabir Hussain Wani Hosam O. Elansary Defensive Mechanisms in Cucurbits against Melon Fly (<i>Bactrocera cucurbitae</i>) Infestation through Excessive Production of Defensive Enzymes and Antioxidants |
description |
Melon fly (<i>Bactrocera cucurbitae</i>) is the most common pest of cucurbits, and it directly causes damage to cucurbit fruits in the early developmental stage. The infection of fruit tissues induces oxidative damage through increased generation of cellular reactive oxygen species. The effects of melon fly infestation on the production of defensive enzymes and antioxidant capabilities in five cucurbit species, namely, bottle gourd, chayote, cucumber, snake gourd, and bitter gourd, were investigated in this study. The total phenolic and flavonoid content was considerably higher in melon fly infestation tissues compared to healthy and apparently healthy tissues. The chayote and bottle gourd tissues expressed almost 1.5- to 2-fold higher phenolic and flavonoid contents compared to the tissues of bitter gourd, snake gourd, and cucumber upon infestation. Defensive enzymes, such as peroxidase (POD), superoxide dismutase (SOD), polyphenol oxidase (PPO), and catalase (CAT), were high in healthy and infected tissues of chayote and bottle gourd compared to bitter gourd, snake gourd, and cucumber. The activity of POD (60–80%), SOD (30–35%), PPO (70–75%), and CAT (40–50%) were high in infected chayote and bottle gourd tissue, representing resistance against infestation, while bitter gourd, snake gourd, and cucumber exhibited comparatively lower activity suggesting susceptibility to melon fly infection. The antioxidant properties were also high in the resistant cucurbits compared to the susceptible cucurbits. The current research has enlightened the importance of redox-regulatory pathways involving ROS neutralization through infection-induced antioxidative enzymes in host cucurbit resistance. The melon fly infestation depicts the possible induction of pathways that upregulate the production of defensive enzymes and antioxidants as a defensive strategy against melon fly infestation in resistant cucurbits. |
format |
article |
author |
Madhusudana Somegowda S. Raghavendra Shankarappa Sridhara Achur. N. Rajeshwara Siddanakoppalu. N. Pramod S. Shivashankar Feng Lin Tarek K Zin El-Abedin Shabir Hussain Wani Hosam O. Elansary |
author_facet |
Madhusudana Somegowda S. Raghavendra Shankarappa Sridhara Achur. N. Rajeshwara Siddanakoppalu. N. Pramod S. Shivashankar Feng Lin Tarek K Zin El-Abedin Shabir Hussain Wani Hosam O. Elansary |
author_sort |
Madhusudana Somegowda |
title |
Defensive Mechanisms in Cucurbits against Melon Fly (<i>Bactrocera cucurbitae</i>) Infestation through Excessive Production of Defensive Enzymes and Antioxidants |
title_short |
Defensive Mechanisms in Cucurbits against Melon Fly (<i>Bactrocera cucurbitae</i>) Infestation through Excessive Production of Defensive Enzymes and Antioxidants |
title_full |
Defensive Mechanisms in Cucurbits against Melon Fly (<i>Bactrocera cucurbitae</i>) Infestation through Excessive Production of Defensive Enzymes and Antioxidants |
title_fullStr |
Defensive Mechanisms in Cucurbits against Melon Fly (<i>Bactrocera cucurbitae</i>) Infestation through Excessive Production of Defensive Enzymes and Antioxidants |
title_full_unstemmed |
Defensive Mechanisms in Cucurbits against Melon Fly (<i>Bactrocera cucurbitae</i>) Infestation through Excessive Production of Defensive Enzymes and Antioxidants |
title_sort |
defensive mechanisms in cucurbits against melon fly (<i>bactrocera cucurbitae</i>) infestation through excessive production of defensive enzymes and antioxidants |
publisher |
MDPI AG |
publishDate |
2021 |
url |
https://doaj.org/article/e53adee615a74ee39f71cb58b19af56b |
work_keys_str_mv |
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