The foliar trichomes of Combretum apiculatum subsp. apiculatum (Combretaceae): Morphoanatomy and histochemistry

Parusnath, Myuri; Naidoo, Yougasphree; Akwu, N

doi:10.1016/j.sajb.2022.08.024

Cited by 3 publications

(1 citation statement)

References 82 publications

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“…This correlates with our findings in [19] as there are different trichomes morphology in Grewia lasiocarpa which contain different phytometabolites. Although their distribution within a plant differs considerably [22,27], phytometabolites such as alkaloids, flavonoids, essential oils, and phenols are present in glandular trichomes [28,29]. This variation in trichome morphology and phytometabolites that are present in the glandular trichomes as a result of multiple evolutionary events [30].…”

Section: Introductionmentioning

confidence: 99%

Development and Biomechanics of Grewia lasiocarpa E. Mey. Ex Harv. Trichomes Exudate

Akwu

Naidoo

Singh

et al. 2023

Plants

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Grewia lasiocarpa E. Mey. Ex Harv., Malvaceae (forest raisin) is a tropical small tree or shrub valued for its ecological importance as well as its nutritional, antioxidant, antibacterial, and anti-cancer properties as well as its ecological and ornamental importance. Glandular and non-glandular trichomes are present on the fruits, stem bark and leaves of G. lasiocarpa and these trichomes are the first line of defense. They are important structures that plants use to combat biotic and abiotic stress. The development of G. lasiocarpa trichomes and the biomechanics of the exudates present in the glandular (capitate) trichome were investigated for the first time using advanced microscopy techniques [Scanning electron microscope (SEM) and Transmission electron microscope (TEM)]. The pressurized cuticular striations may play a role in the exudates’ biomechanics, i.e., releasing secondary metabolites present in the capitate trichome, which was observed to be multidirectional. The presence of many glandular trichomes on a plant implies an increase in the amount of phytometabolites. A common precursor for the development of trichomes (non-glandular and glandular) was observed to be DNA synthesis associated with a periclinal cell division, thus the final fate of the cell is determined by cell cycle regulation, polarity, and expansion. The glandular trichomes of G. lasiocarpa are multicellular and polyglandular, while the non-glandular (glandless) trichomes are either single-celled or multicellular. Since, trichomes ‘house’ phytocompounds of medicinal, nutritional, and agronomical benefits; the molecular and genetic study of the glandular trichomes of Grewia lasiocarpa will be beneficial to humanity.

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Section: Introductionmentioning

confidence: 99%

Development and Biomechanics of Grewia lasiocarpa E. Mey. Ex Harv. Trichomes Exudate

Akwu

Naidoo

Singh

et al. 2023

Plants

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A comprehensive review of Combretum flavonoids and their biological activities: An update between 1990 and 2022

Umoh

Bojase

Masesane

et al. 2023

Biochemical Systematics and Ecology

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Chloroplast damage induced by simulated acid rain is delayed in soybean plants pretreated with 24- epibrassinolide: Evidence connected to photosynthesis and biomass

Lobato,

Pontes,

Gonçalves

et al. 2024

Preprint

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Acid rain (AR) is a major climate change-related factor that adversely affects plant metabolism and reduces crop and cereal yield. The natural, biodegradable plant growth regulator 24-epibrassinolide (EBR) has multiple effects on plant performance, including enhancing photosynthesis, antioxidant defences, and growth. In this study, we investigated whether pre-treatment with EBR can protect soybean plants exposed to simulated acid rain (SAR), with a focus on its impact on chloroplast pigments, photosynthetic apparatus, and biomass. The experiment was designed with four treatments, namely, two SAR (0 and 0.5 M H2SO4, designated – SAR and + SAR, respectively) and two brassinosteroid concentrations (0 and 100 nM EBR, defined as – EBR and + EBR, respectively). Five replicates for each of the four treatments were conducted, yielding 20 experimental units used in the experiment, with one plant in each. SAR adversely affected plant metabolism and growth; however, plants pretreated with EBR exhibited less damage to leaf structures and higher biomass under SAR conditions. Chloroplastic pigment degradation was delayed, and was detected as increased chlorophyll a (23%), chlorophyll b (29%), and total chlorophyll (24%) compared to plants receiving similar treatment without EBR. Regarding gas exchange, increments in net photosynthetic rate and water-use efficiency of 44% and 41%, respectively, were observed. These results can be explained by the stimulating effects of EBR pretreatment on stomatal characteristics, including stomatal density. Therefore, this study revealed that exogenous EBR application delayed SAR-induced deleterious effects in soybean plants.

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The foliar trichomes of Combretum apiculatum subsp. apiculatum (Combretaceae): Morphoanatomy and histochemistry

Cited by 3 publications

References 82 publications

Development and Biomechanics of Grewia lasiocarpa E. Mey. Ex Harv. Trichomes Exudate

Development and Biomechanics of Grewia lasiocarpa E. Mey. Ex Harv. Trichomes Exudate

A comprehensive review of Combretum flavonoids and their biological activities: An update between 1990 and 2022

Chloroplast damage induced by simulated acid rain is delayed in soybean plants pretreated with 24- epibrassinolide: Evidence connected to photosynthesis and biomass

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