Micromorphology of the epidermis and anatomical structure of the leaves of Scorzonera hispanica L.

Chwil, Mirosława; Krawiec, Marcela; Krawiec, Paweł; Chwil, Stanisław

doi:10.5586/asbp.2015.033

Cited by 6 publications

(4 citation statements)

References 28 publications

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“…Almost all species (98%) have a vascular bundle sheath, but only in 73% of these there are sheath extensions, whereas sclerified cells associated with bundle sheaths are rare in the species studied, as in other members of the family (Aytas-Akcin and Akcin, 2017). Bundle sheaths have also been recorded for other taxa of Asteraceae (Bombo et al, 2012;Chwil et al, 2015;Mendes et al, 2016;De Sousa et al, 2018;Lusa et al, 2018) and they appear to be one of the most common traits in the family.…”

Section: Discussionmentioning

confidence: 94%

Leaf architecture and anatomy of Asteraceae species in a xerophytic scrub in Mexico City, Mexico

et al. 2019

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Background and Aims: Leaf architecture and anatomy in the Asteraceae family are extremely diverse and have been studied from ecological, physiological and evolutionary perspectives. The aims of this study are to describe in detail leaf architecture and anatomy for 61 species belonging to 13 tribes of Asteraceae inhabiting a xerophytic scrub in Mexico City, Mexico and to discuss characters common to these tribes.Methods: Mature and undamaged leaves of 61 species of Asteraceae were collected in southwestern Mexico City in the “Reserva Ecológica del Pedregal de San Ángel” (REPSA). Standard anatomical techniques were used to obtain permanent slides of cleared leaves and transverse and paradermal sections. The permanent slides were analyzed to describe leaf architecture and anatomy by tribe following the standard terminologies.Key results: The results show a significant variation in leaf architecture although pinnate venation, brochidodromous secondary venation, areoles moderately developed and looped ultimate marginal venation predominate in the material studied. For anatomy, the most common traits are the striate cuticle, occurrence of trichomes and glands, as well as collateral vascular bundles with a parenchymatous sheath with girders in the Asteraceae present in this xerophytic scrub. There are no unique combinations of leaf characters for the family or any tribe.Conclusions: Leaf diversity in the family and within each tribe is consistent with some previous reports. Anatomical descriptions are a fundamental piece of the evolutionary, ecological and physiological studies in Asteraceae. The results of this descriptive study will allow testing hypotheses about the factors causing leaf diversity in this plant lineage. More leaf anatomical studies of the family are necessary to confirm the patterns proposed for the tribes and the family.

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Section: Discussionmentioning

confidence: 94%

Leaf architecture and anatomy of Asteraceae species in a xerophytic scrub in Mexico City, Mexico

et al. 2019

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“…For this purpose, measurements of the polar axis Q and equatorial axis Q have been broadly used (Groppo et a/. 2010;Chwil 2015). In the case of I. coccinea, cv.…”

Section: Discussionmentioning

confidence: 99%

HARVESTING TIME AND VIABILITY OF Ixora coccinea 'Dwarf Red Coccinea' POLLEN

Leung¹

2021

BIOTROPIA

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The cultivated variety of the non-native I. coccinea, Knowledge about pollen of Ixora coccinea, cv. â€˜Dwarf Red Coccineaâ€™ to be collected for basic investigations or plant breeding purposes is limited. Under a light microscope, I. coccinea, cv. â€˜Dwarf Red Coccineaâ€™ pollen was generally prolate in shape which was different from that ofÂ I. congesta and I. arborea. In addition, the quantity, viability and germinability of pollen collected at different times from 8 am to 4 pm in a summer day from the flowers of I. coccinea, cv. â€˜Dwarf Red Coccineaâ€™ were investigated. Pollen quantity was determined using a haemacytometer while the viable and germinable pollen was examined after staining with 1% acetocarmine and germinating on a modified agar-gelled germination medium, respectively. The I. coccinea, cv. â€˜Dwarf Red Coccineaâ€™ pollen collected at 10 am exhibited the highest pollen density and germination percentage of 53.3Ã—104 pollen/ml and 72.05%, respectively. When these pollen were germinated on the artificial medium supplemented with various sucrose concentrations, the highest in vitro '˜Dwarf Red Coccinea' pollen germinability was found on a medium containing 10% sucrose. It was concluded that the best time to collect I. coccinea, cv. '˜Dwarf Red Coccinea' pollen was at 10 AM. Further studies would be worthwhile to investigate more closely the effect of changes in the environmental factors (for example, ambient temperature and humidity) even within the same day on harvestable pollen quantity and quality as well as pistil phenology to develop a more complete breeding strategy for Ixora.

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“…In the case of scorzonera, the mechanical strength of the leaves determines their vulnerability to damage due to intensive rainfall and wind. This type of damage affects the base region of the leaf and results in the leaf cracking in the location of the vascular bundle (Chwil et al 2015). This results in the death of the leaf and a reduction in the assimilative area of the plant, and consequently a reduced yield from the leaves and roots.…”

Section: Investigated Featurementioning

confidence: 99%

“…These may originate both from abiotic factors such as winds or precipitation but can also be due to biotic damage caused by feeding insects and herbivorous animals (Read andStokes 2006, Read andSanson 2003). For instance, damage suffered by Scorzonera hispanica leaves due to heavy rainfall takes the form of cracks in the vicinity of the leaf base and affect the adaxial part of the leaf (Chwil et al 2015). Such damage may reduce the assimilative and yield-producing potential of the plant and deteriorate the quality of the leaves as edible parts of the plant.…”

Section: Introductionmentioning

confidence: 99%

Impact of seed light stimulation on the mechanical strength and photosynthetic pigments content in the scorzonera leaves

Ciupak¹,

Dziwulska‐Hunek²,

Krawiec³

et al. 2019

Acta Agroph.

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The leaves of scorzonera are vulnerable to mechanical damage due to heavy rainfall or wind. The aim of the study was to determine the impact of pre-sowing exposure of scorzonera seeds to laser light on the mechanical strength of the leaves and the content of photosynthetic pigments. The research material consisted of scorzonera leaves obtained from seeds treated with He-Ne laser light at the wavelength of 632.8 nm, surface power density of 5 mW cm-2 , and exposure time of 1, 5, 10, and 30 minutes. Young's modulus measurements showed that the leaves of the plants grown from seeds subjected to laser light stimulation were characterized by better mechanical strength compared to the leaves of the control. The highest values of the Young's modulus were recorded for scorzonera plants grown from seeds subjected to laser light exposure for 10 minutes. Exposure to light for a period of 1, 5 and 30 minutes significantly affected the content of chlorophylls and carotenoids in the leaves relative to the control. The largest increase in the content of photosynthetic pigments was recorded for 1 minute. The improvement in the mechanical strength of scorzonera leaves may reduce their vulnerability to mechanical damage during vegetation.

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Micromorphology of the epidermis and anatomical structure of the leaves of Scorzonera hispanica L.

Cited by 6 publications

References 28 publications

Leaf architecture and anatomy of Asteraceae species in a xerophytic scrub in Mexico City, Mexico

Leaf architecture and anatomy of Asteraceae species in a xerophytic scrub in Mexico City, Mexico

HARVESTING TIME AND VIABILITY OF Ixora coccinea 'Dwarf Red Coccinea' POLLEN

Impact of seed light stimulation on the mechanical strength and photosynthetic pigments content in the scorzonera leaves

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