Effects of nymphal density (Bactericera trigonica) and feeding on photosynthetic pigments, proline content and phenolic compounds in carrot plants

Othmen, Soukaina Ben; Boussaa, Faten; Hajji-Hedfi, Lobna; Abbess, Khaled; Dbara, Soumaya; Chermiti, Brahim

doi:10.1007/s10658-021-02456-9

Cited by 7 publications

(11 citation statements)

References 34 publications

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“…Research have demonstrated that a heightened presence of phenolic compounds within plant tissues exerts a suppressive effect on the metabolic activity of numerous insect pests. The elevated concentration of phenolic compounds in plant tissues has been associated with a reduction in their ability for feeding, subsequently weaken these pests (Dixit et al, 2017;Hisham et al, 2022;Othmen et al, 2022;Silva et al, 2005;Usha Rani & Pratyusha, 2014). Lignin, a complex phenolic polymer, plays a multifaceted role in augmenting the rigidity and hydrophobic properties of plant cell walls, facilitating the translocation of minerals via vascular bundles in plants.…”

Section: Introductionmentioning

confidence: 99%

Severity of Termites (Microcerotermes diversus Silvestri) Infestation on Date Palms

Qraidi,

Alyousuf,

Al-etby

2024

VMPH

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Objective: This study was aimed to evaluate intensity of infestation and annual distribution of termite community in palm orchards in southern governorates of Iraq (Basra and Maysan) to develop appropriate integrated management programs to control termite (Microcerotermis diversus Selvestry) in palm groves. Methods: A field survey was conducted for a whole year(October 2022- September 2023) to evaluate termite community, also relationship between intensity of termite infestation with some palm varieties was studied, and a correlation was made with some important contents for termite vitality in tissues of the frond bases such as Proteins, carbohydrates, phenols, and lignin were estimated to determine which varieties are more tolerant to termite infestation and the most sensitive. Results: Survey showed that palm varieties Khadrawi and Shakkar most susceptible to invasion, with rates of 52.19 and 48.4 termites/frond base, respectively. As for the Barhi and Al-Maktoum cultivars, they had lowest percentage of termite infestation, with 0 and 10.0 termites/frond base, respectively. Conclusions: Termite (Microcerotermis diversus Selvestry) prefers to invade some palm varieties that have a suitable content of carbohydrates and proteins (Khadrawi and Shakkar), especially in the moderate and cold months of the year. Termite community decrease in hot months of the year; therefore we recommend carrying out integrated termite management operations at the beginning of October and November in palm groves in arid and semi-arid areas similar to the areas of southern Iraq.

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Section: Introductionmentioning

confidence: 99%

Severity of Termites (Microcerotermes diversus Silvestri) Infestation on Date Palms

Qraidi,

Alyousuf,

Al-etby

2024

VMPH

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“…The consumption and production of carrots are increasing in recent years as this vegetable is recognized as a valuable source of natural antioxidants (β-carotene) with anticancer, free radical scavenging, antimutagenic, and immune-boosting effects [ 2 ]. The major economic problem in carrot cultivation is yellow disease with symptoms such as curling and discoloration of leaves (yellowish, bronze, purple leaves), stunting of shoots and roots, proliferation of secondary roots, and altered (bitter) taste [ 4 ]. Leaf yellowing is the main symptom very often associated in the past with the transmission of the fastidious alpha-proteobacterium " Candidatus Liberibacter solanacearum".…”

Section: Introductionmentioning

confidence: 99%

“…Because of the similarities between symptoms caused by insect feeding and symptoms of pathogens, there is considerable overlap between plant responses to pathogens and plant responses to insects [ 10 ]. However, recent studies have clearly shown that the observed symptoms on carrot leaves and the change in root quality are mainly caused by B. trigonica infestation and not by the presence of proteobacterium [ 4 ].…”

Section: Introductionmentioning

confidence: 99%

“…The life cycle of B. trigonica is last about one month and several generations during the year can be produced in the field. Imago and nymphs of B. trigonica feed on carrot leaves cause chlorosis and leaf yellowing, and when present in larger numbers, lead to lower crop productivity, yield, and root quality [ 4 , 19 ]. Under laboratory conditions, they can have up to 9 generations during a year [ 19 ].…”

Section: Introductionmentioning

confidence: 99%

“…Under laboratory conditions, they can have up to 9 generations during a year [ 19 ]. Recent studies have shown that plant age, temperature, and insect sex have a crucial influence on the damage intensity caused by B. trigonica infestation on carrot [ 4 , 7 , 33 ].…”

Section: Introductionmentioning

confidence: 99%

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Physiological and oxidative stress response of carrot (Daucus carota L.) to jumping plant-louse Bactericera trigonica Hodkinson (Hemiptera: Psylloidea) infestation

Đurić,

Jevremović,

Trifunović-Momčilov

et al. 2024

BMC Plant Biol

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Background Carrot is an important vegetable crop grown worldwide. The major economic problem in carrot cultivation is yellow disease caused by Bactericera trigonica, which induces biotic stress and has the greatest impact on crop productivity. Comprehensive studies on the mechanism of carrot defense response to biotic stress caused by B. trigonica infestation have yet to be conducted. Methods The changes in photosynthetic pigments, proline, TPC, H2O2 and MDA content, DPPH radical scavenging ability, and antioxidant enzyme activity of SOD, CAT, and POX in carrot leaves in response to insect sex (female and male), rapid response (during the first six hours), and long-term response to B. trigonica infestation were evaluated. Results The results of our study strongly suggest that B. trigonica infestation causes significant changes in primary and secondary metabolism and oxidative status of carrot leaves. Photosynthetic pigment content, TPC, and DPPH and CAT activities were significantly reduced in carrot leaves in response to insect infestation. On the other hand, proline, H2O2 content, and the activity of the antioxidant enzymes superoxide dismutase and peroxidase were increased in carrot leaves after B. trigonica infestation. The results indicate that B. trigonica attenuates and delays the oxidative stress responses of carrot, allowing long-term feeding without visible changes in the plant. Carrot responded to long-term B. trigonica infestation with an increase in SOD and POX activity, suggesting that these enzymes may play a key role in plant defense mechanisms. Conclusions This is the first comprehensive study strongly suggesting that B. trigonica infestation causes significant changes in primary and secondary metabolism and an attenuated ROS defense response in carrot leaves that enables long-term insect feeding. The information provides new insights into the mechanisms of carrot protection against B. trigonica infestation.

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Feeding-induced plant metabolite responses to a phoretic gall mite, its carrier psyllid and both, after detachment

Yang,

Li,

Qiao

et al. 2023

Exp Appl Acarol

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Effects of nymphal density (Bactericera trigonica) and feeding on photosynthetic pigments, proline content and phenolic compounds in carrot plants

Cited by 7 publications

References 34 publications

Severity of Termites (Microcerotermes diversus Silvestri) Infestation on Date Palms

Severity of Termites (Microcerotermes diversus Silvestri) Infestation on Date Palms

Physiological and oxidative stress response of carrot (Daucus carota L.) to jumping plant-louse Bactericera trigonica Hodkinson (Hemiptera: Psylloidea) infestation

Feeding-induced plant metabolite responses to a phoretic gall mite, its carrier psyllid and both, after detachment

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