Impact of leaf infestation by herbivorous insects on the elemental uptake of citrus trees

Semhi, Khadija; Clauer, Norbert; Al-Raeesi, Ali Ahmed

doi:10.1007/s41348-018-0192-2

Cited by 1 publication

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“…Arnold et al (2012) proposed that plant phenolic accumulation might be an adaptive strategy to sequester the excess carbon that accumulates in the gall. The reduced level of Na + , K + , Ca 2+ , and Mg 2+ detected in Tamarix shoots (Table 1) may be explained by a reduction in their absorption by the plant and/or their utilization by the insects for nutrition (Semhi et al, 2019). It is worth noting that the observed decrease in Mg 2+ levels was accompanied by a low pigment content in infected Tamarix branches; Mg 2+ is an essential element in chlorophyll biosynthesis.…”

Section: Resultsmentioning

confidence: 87%

Structural, Physiological and Biochemical Alterations on the Galled-Stem of Tamarix nilotica

Younis

2021

Egypt. J. Bot.

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T AMARIX nilotica (Tamaricaceae) is an important wild medicinal plant. It inhabits semiarid environments, where it is often one of the most important plants suitable for insect infestation. Thrips (Thysanoptera: Insecta) infect T. nilotica and cause the formation of galls, which affect plant growth and development. Therefore, the present work was undertaken to study the morpho-anatomical, biochemical, and physiological changes induced by insect infestation in T. nilotica. Zeatin (Zn), gibberellin (GA 3 ), salicylic acid (SA), 24-epibrassinolide (BR), and abscisic acid (ABA) were increased in the infected stems relative to the healthy ones. Galled stems showed increased thickness of the periderm and phellem layers, whereas a large portion of the vascular cylinder had disappeared, leaving a large C-shaped cavity in which the mature insect nested. Gall sites exhibited decreased chlorophyll content which was associated with a decrease in the emission of chlorophyll a fluorescence. Moreover, total soluble sugars, sucrose, total free amino acids, total soluble protein, and mineral content, as well as the activities of SOD, CAT, PX, PO, APX, and AO, were significantly reduced in the infected Tamarix stems, whereas polysaccharides, proline, MDA, and H 2 O 2 were increased compared with the healthy stems. Galled stems exhibited increased antiradical activity (expressed as IC 50 ), which was concomitant with the accumulation of phenolics, tannins, alkaloids, and flavonoids and the enhancement of PAL. Six endophytic fungi inhabited Tamarix galls. The development of thrips galls on T. nilotica stems drastically impacted the host structure and its cellular metabolism and induced oxidative stress. The roles and effects of endophytic fungi on insect-induced galls warrants further exploration.

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Section: Resultsmentioning

confidence: 87%

Structural, Physiological and Biochemical Alterations on the Galled-Stem of Tamarix nilotica

Younis

2021

Egypt. J. Bot.

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show abstract

Impact of leaf infestation by herbivorous insects on the elemental uptake of citrus trees

Cited by 1 publication

References 62 publications

Structural, Physiological and Biochemical Alterations on the Galled-Stem of Tamarix nilotica

Structural, Physiological and Biochemical Alterations on the Galled-Stem of Tamarix nilotica

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