#asterids - Twitter Hashtag

Sophien Kamoun

@KamounLab

8 months ago

Cornus officinalis | Japanese cornel | Cornales #asterids https://t.co/jKhBYKYzqi

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Stefan F. Wirth

@wirthstef

almost 3 years ago

The great #mullein #Verbascum #thapsus (#Scrophulariaceae, #Asterids) is a striking plant due to its growth shape and height, which has evolutionary adaptations to #warmth and #drought. The #photos show an area in the Rehberge urban park in #Berlin in early autumn. The sun-exposed #meadow area was largely dried out in 2023 due to the high summer heat. Almost like in a desert, only the inflorescences of the great mullein rise up. The plant, which can grow up to two meters high, is #biennial or #perennial, but in the latter case it only flowers once. This phenomenon is called #hapaxanth. As a storage organ, the mullein has a thickened root that is shaped like a turnip. The fruits that develop between July and October are so-called #capsulefruits. These light germs are spread via the wind. The number of chromosomes can be 2n = 32, alternatively 36. The species is #native to Europe, Central Asia, Siberia, Japan, China, India and Pakistan. However, in many regions V. thapsus also occurs as a #neophyte. For example in Australia, New Zealand, Hawaii, Canada, the United States or Argentina. The species has numerous #pollinators in its native range, including bees, Syrphidae dipterans and butterflies, and it can also serve as a food plant for the larvae of the latter. An example is #Cucullia #verbasci (Noctuidae, Lepidoptera). Different parts of the plant represent special #adaptations to drought and heat. A hairy coating with #trichomes on all parts of the plant that grow above ground protects against radiation and waterloss. The wrinkled leaves are also more resistant to solar radiation and protect against excessive evaporation, and they are also arranged to redirect rainwater towards the roots. The authors M. Hock et al. (2020) examined the tolerance of V. thapsus to #UVB radiation and drought comparing populations from the original distribution area (here Germany) and invasive populations in #NewZealand and found that there are no different local adaptations regarding the named tolerances. They conclude that there must be underlying #predispositions. The authors S. A. Khan et al. (2020) deal with morpho-anatomical, #phytochemical and #bioelemental analyzes of various plant parts, including #atomicabsorptionspectroscopy to analyze four macro and seven microelements. Y.M. Okasha et al. (2023) studied #antiviral, antibacterial and #anticancer components of V. thapsus. They methodically used real-time RT-PCR, the disk diffusion method and an SRB assay. © #StefanFWirth Berlin 2023 Sources: M. Hock et al. (2020): https://t.co/YSVJUYdItT S. A. Khan et al. (2020): https://t.co/61OHF7ablI Y.M. Okasha et al. (2023): https://t.co/5WTh5AnsvD

wirthstef's tweet photo. The great #mullein #Verbascum #thapsus (#Scrophulariaceae, #Asterids) is a striking plant due to its growth shape and height, which has evolutionary adaptations to #warmth and #drought. The #photos show an area in the Rehberge urban park in #Berlin in early autumn. The sun-exposed #meadow area was largely dried out in 2023 due to the high summer heat. Almost like in a desert, only the inflorescences of the great mullein rise up.

The plant, which can grow up to two meters high, is #biennial or #perennial, but in the latter case it only flowers once. This phenomenon is called #hapaxanth. As a storage organ, the mullein has a thickened root that is shaped like a turnip. The fruits that develop between July and October are so-called #capsulefruits. These light germs are spread via the wind. The number of chromosomes can be 2n = 32, alternatively 36. The species is #native to Europe, Central Asia, Siberia, Japan, China, India and Pakistan. However, in many regions V. thapsus also occurs as a #neophyte. For example in Australia, New Zealand, Hawaii, Canada, the United States or Argentina. The species has numerous #pollinators in its native range, including bees, Syrphidae dipterans and butterflies, and it can also serve as a food plant for the larvae of the latter. An example is #Cucullia #verbasci (Noctuidae, Lepidoptera).

Different parts of the plant represent special #adaptations to drought and heat. A hairy coating with #trichomes on all parts of the plant that grow above ground protects against radiation and waterloss. The wrinkled leaves are also more resistant to solar radiation and protect against excessive evaporation, and they are also arranged to redirect rainwater towards the roots. The authors M. Hock et al. (2020) examined the tolerance of V. thapsus to #UVB radiation and drought comparing populations from the original distribution area (here Germany) and invasive populations in #NewZealand and found that there are no different local adaptations regarding the named tolerances. They conclude that there must be underlying #predispositions. The authors S. A. Khan et al. (2020) deal with morpho-anatomical, #phytochemical and #bioelemental analyzes of various plant parts, including #atomicabsorptionspectroscopy to analyze four macro and seven microelements. Y.M. Okasha et al. (2023) studied #antiviral, antibacterial and #anticancer components of V. thapsus. They methodically used real-time RT-PCR, the disk diffusion method and an SRB assay.

© #StefanFWirth Berlin 2023

Sources:

M. Hock et al. (2020):
https://t.co/YSVJUYdItT

S. A. Khan et al. (2020):
https://t.co/61OHF7ablI

Y.M. Okasha et al. (2023):
https://t.co/5WTh5AnsvD

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PhytoKeys @PhytoKeys

over 4 years ago

Revision of the southern African species of the taxonomically problematic genus Cynoglossum: a total of eight species are listed for the study region. 📝Research Article: https://t.co/3nbWw3YvXh #PlantScience #Taxonomy #Asterids

PhytoKeys's tweet photo. Revision of the southern African species of the taxonomically problematic genus Cynoglossum: a total of eight species are listed for the study region.

📝Research Article: https://t.co/3nbWw3YvXh

#PlantScience #Taxonomy #Asterids https://t.co/Z1SKfEmJuX

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Peter Laursen @anisotropela

almost 6 years ago

#Asteroids a larger than 1 m in diameter, and include Ceres, Vesta, Pallas, and Hygiea. In contrast, #asterids are typically smaller than 1 m, and include forget-me-not, eggplant, sweet potato, and sesame.

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