Systematics of medicinally important weeds of genus Convolvulus: Convolvulaceae

Ashfaq, Shomaila; Ahmad, Mushtaq; Zafar, Muhammad; Sultana, Shazia; Nazish, Moona; Khan, Rafeeq Alam

doi:10.1590/s0100-83582020380100053

Cited by 2 publications

(1 citation statement)

References 27 publications

(23 reference statements)

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“…In Pakistan various studies have been conducted on microscopic characterization of plant species. The light and scanning microscopic characterization of various groups has been done on various groups of plants (Bano et al, 2020; Ahmad et al, 2013; Ahmad et al, 2020; Ahmad et al, 2020; Ashfaq et al, 2020a) while microscopic characterization of specific groups include Bryophytes (Khan et al, 2020); Gymnosperms (Khan et al, 2019); Pteridophytes (Shah et al, 2020; Shah et al, 2020; Shah et al, 2021); Some of the specific families including Asteraceae (Ahmad et al, 2013; Bano, Ahmad, Zafar, Sultana, & Khan, 2015; Ayaz et al, 2019); Mimosaceae (Khan et al, 2019; Alam et al, 2019; Khan et al, 2021); Convolvulaceae (Ashfaq et al, 2020b); Cactaceae (Majeed et al 2020); Capparidaceae (Mir et al, 2019); Amaranthaceae (Hussain et al, 2018; Nazish et al, 2020); Acanthaceae (Raza et al, 2020); Caryophyllaceae (Ullah et al, 2016; Ullah et al, 2019); Poaceae (Shaheen et al, 2018; Ullah et al, 2016; Khan et al, 2019; Usma et al, 2019; Ahmad 2020; Ullah et al, 2021); Lamiaceae (Gul et al, 2021; Bano et al, 2020); Papilionoideae (Rashid et al, 2019; Rashid et al, 2021; Waheed et al, 2021); Eragrostideae‐Poaceae (Ahmad et al, 2011); Solanaceae (Kayani et al 2019; Ashfaq et al, 2020a); Papilionaceae (Bano et al, 2019); Apiaceae (Kalsoom et al, 2019); Vitaceae (Lubna et al, 2019); Balsaminaceae (Rahman, Ahmad, Zafar, Mumtaz, & Shah, 2017); Caesalpiniaceae (Ullah et al, 2019); Euphorbiaceae (Zahra, Ahmad, Shinwari, Zafar, & Sultana, 2014). However, no work has been done on identification of A. flavus in various areas of Pakistan using microscopic techniques especially SEM.…”

Section: Introductionmentioning

confidence: 99%

Light and scanning electron microscopic characterization of aflatoxins producing Aspergillus flavus in the maize crop

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Akram

Qureshi

et al. 2022

Microscopy Res & Technique

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Maize (Zea mays L.) is considered as one of the main cereals, used as a source of food, forage, and processed products. The loss of maize productivity is reported due to effect on roots, stalks, ears, and kernels mainly caused by many fungi. Among these fungal pathogens of maize, Aspergillus flavus (A. flavus) are the most prevalent that produces highly toxigenic aflatoxins that are highly carcinogenic to the consumers.The present study is confined to isolate and characterize the A. flavus from maize seeds for accurate identification that can be helpful for determination and management of aflatoxins in maize crop. Eighty stored seed samples of maize were collected from warehouses where seeds are stored for food and feeding purposes. For the isolation of A. flavus, Potato Dextrose Agar was used. Isolated fungi were identified macro and microscopically using light microscope and scanning electron microscope.A total of 212 Aspergillus isolates were identified based on macro-morphological and micro-morphological characteristics. The results showed that A. flavus colonies were granular, flat with yellow-green to deep yellow-green colony color having a white border and compact, spherical spore heads. Rapid rate of growth was observed maturing in about 3-5 days. In microscopic features, A. flavus have apically swollen conidiophores with various conidia bearing cells in long and dry chains. Spherical conidial heads were split into several columns ranging 300-400 μm in diameter. This will be helpful for farmers, researchers and traders in future for correct identification of sources of aflatoxins. Research Highlights• Maize seed samples were collected from Pothohar region of Pakistan.• The fungi were isolated on PDA.• Aspergillus flavus was identified macro-morphologically by observing growth rate, colony color and texture.• Furthermore, these fungi were identified micro-morphologically by using light and scanning electron microscope.• The 212 Aspergillus flavus strains were isolated and identified.

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Section: Introductionmentioning

confidence: 99%

Light and scanning electron microscopic characterization of aflatoxins producing Aspergillus flavus in the maize crop

Seerat

Akram

Qureshi

et al. 2022

Microscopy Res & Technique

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Palynological Study of Weed Flora from Potohar Plateau

et al. 2022

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The pollen morphology of weeds was investigated by scanning electron microscopy (SEM). A morpho-palynological investigation of 18 species of weeds that belongs to 16 angiosperms families was performed using SEM to document distinguishable microscopic features. The main objective of the present study was to provide basic knowledge about morpho-palynological features of weed species that helps delimit the weed flora of the Potohar Plateau. The results show diversity among the qualitative and quantitative characteristics of pollen shape, equatorial and polar axis diameter, the exine’s thickness, and the exine’s surface ornamentation. The pollen grains were spherical, prolate-spheroidal, oblate-spheroidal, and sub-oblate. The exine ornamentation in most species was reticulate, scarbate, aerolate, faveolate, reticulate-perforate, and reticulate-scabrate. All the species described possessed tricolpate pollen. The variations found in the thickness of the exine and other characters were helpful at the genus and species-specific levels. In accordance with these variations, a taxonomic key was prepared using these characteristics to identify and differentiate weed plant species. SEM images of pollen grains can help delimit the taxa to the species level. This study provides baseline information to distinguish the species of weeds.

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Systematics of medicinally important weeds of genus Convolvulus: Convolvulaceae

Abstract: HIGHLIGHTS  To determine the medicinal uses of the two important weeds  To determine the Pollen grains morphology through (SEM)  Foliar anatomical characters (LM) of the weed plants for correct systematic identification.

Cited by 2 publications

References 27 publications

Light and scanning electron microscopic characterization of aflatoxins producing Aspergillus flavus in the maize crop

Light and scanning electron microscopic characterization of aflatoxins producing Aspergillus flavus in the maize crop

Palynological Study of Weed Flora from Potohar Plateau

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