Guard Cell Collection

English oak leaf pores, SEM
English oak leaf pores. Coloured scanning electron micrograph (SEM) of stomata (round) on the underside of a leaf from an English oak (Quercus robur) tree

French lavender leaf pore, SEM
French lavender leaf pore. Coloured scanning electron micrograph (SEM) of an open stoma (centre, black). Stomata are pores that open and close in order to regulate gas exchange in a plant

Chives leaf stoma, SEM C016 / 8060
Chives leaf stoma. Coloured scanning electron micrograph (SEM) of a stoma (oval, centre) on the surface of a leaf from a chives (Allium schoenoprasum) plant

Coltsfoot leaf stomata, SEM C016 / 8052
Coltsfoot leaf stomata. Coloured scanning electron micrograph (SEM) of two stomata (round) on the surface of a leaf from a coltsfoot (Tussilago farfara) plant

Illustration of different types of cells, nerve cells, red blood cell, muscle cell, and guard cells of a leaf

Tobacco leaf, SEM C016 / 9465
Tobacco leaf. Coloured scanning electron micrograph (SEM) of the underside of a winged tobacco (Nicotiana alata) leaf, showing trichomes (long) and a stomata (small, oval)

Squash leaf, SEM C016 / 9463
Squash leaf. Coloured scanning electron micrograph (SEM) of the lower surface of a squash (Curcubita maxima) leaf, showing trichomes (mushroom-shaped) and a stoma (slit, upper centre)

Thale cress leaf stoma, SEM C016 / 9460
Thale cress leaf stoma. Coloured scanning electron micrograph (SEM) of a stoma (round, centre) on the surface of a leaf from a thale cress (Arabidopsis thaliana) plant

Thale cress leaf stoma, SEM C016 / 9459
Thale cress leaf stoma. Coloured scanning electron micrograph (SEM) of a stoma (round, centre) on the surface of a leaf from a thale cress (Arabidopsis thaliana) plant

Squash leaf, SEM C016 / 9464
Squash leaf. Coloured scanning electron micrograph (SEM) of the underside of a squash (Curcubita maxima) leaf, showing trichomes (mushroom-shaped) and a stoma (slit, upper centre)

Plant stoma, ESEM
Plant stoma, coloured environmental scanning electron micrograph (ESEM). A stoma is a pore that regulates the exchange of gases and water vapour into and out of the plant

Sorrel leaf stoma, SEM C016 / 8059
Sorrel leaf stoma. Coloured scanning electron micrograph (SEM) of a stoma (round, centre) on the surface of a leaf from a common sorrel (Rumex acetosa) plant

Sorrel leaf stoma, SEM C016 / 8058
Sorrel leaf stoma. Coloured scanning electron micrograph (SEM) of a stoma (round, centre) on the surface of a leaf from a common sorrel (Rumex acetosa) plant

Sorrel leaf stoma, SEM C016 / 8057
Sorrel leaf stoma. Coloured scanning electron micrograph (SEM) of a stoma (round, centre) on the surface of a leaf from a common sorrel (Rumex acetosa) plant

Sorrel leaf stoma, SEM C016 / 8055
Sorrel leaf stoma. Coloured scanning electron micrograph (SEM) of a stoma (oval, centre) on the surface of a leaf from a common sorrel (Rumex acetosa) plant

Coltsfoot leaf stoma, SEM C016 / 8051
Coltsfoot leaf stoma. Coloured scanning electron micrograph (SEM) of a stoma (oval) on the surface of a leaf from a coltsfoot (Tussilago farfara) plant

Pine needle surface, SEM C015 / 5167
Pine needle surface. Coloured environmental scanning electron micrograph (ESEM) of the surface of a pine needle (Pinus sp.) showing stomata (red)

Tomato leaf stoma, SEM C015 / 5174
Tomato leaf stoma. Coloured environmental scanning electron micrograph (ESEM) of a stoma (centre) on the surface of a tomato (Solanum lycopersicum) leaf

Pine needle stoma, SEM C015 / 5168
Pine needle stoma. Coloured environmental scanning electron micrograph (ESEM) of a stoma (red) on the surface of a pine needle (Pinus sp.)

Closed stoma on Kalanchoe leaf, SEM C016 / 4428
Closed stoma on Kalanchoe leaf. Coloured scanning electron micrograph (SEM) of a leaf from the succulent Kalanchoe blossfeldiana, showing a closed stoma (centre)

Closed stoma on Kalanchoe leaf, SEM C016 / 4427
Closed stoma on Kalanchoe leaf. Coloured scanning electron micrograph (SEM) of a leaf from the succulent Kalanchoe blossfeldiana, showing a closed stoma (centre)

Closed stoma on Kalanchoe leaf, SEM C016 / 4424
Closed stoma on Kalanchoe leaf. Coloured scanning electron micrograph (SEM) of a leaf from the succulent Kalanchoe blossfeldiana, showing a closed stoma (centre)

Plant anion channel protein homologue C016 / 2555
Plant anion channel protein homologue, molecular model. Obtained from the bacterium Haemophilus influenzae, this anion channel protein (TehA) is being studied due to its common structure (homologue)

Plant anion channel protein homologue C016 / 2556
Plant anion channel protein homologue, molecular model. Obtained from the bacterium Haemophilus influenzae, this anion channel protein (TehA) is being studied due to its common structure (homologue)

Spiderwort leaf surface, light micrograph
Spiderwort lead surface. Light micrograph of a stomata (centre and bottom right) on the lead of a spiderwort (Tradescantia sp.) plant

LM of the leaf of the sensitive plant
Light micrograph of the surface of a leaf of the sensitive plant, Mimosa pudica, showing the interlocking, jigsaw-like network of epidermal cells

LM of the surface of a sycamore leaf
Light micrograph of the surface of a leaf of the sycamore tree, Acer pseudoplatanus. The six small oval structures visible on the leaf surface are stomata (pores)

LM of the surface of an elder leaf
Light micrograph of the surface of a leaf of the elder tree, Sambucus nigra. The small oval structures scattered over the surface are stomata (pores)

LM of a stoma on a Tradescantia leaf
Light micrograph of the surface of a leaf of the spider wort plant, Tradescantia, showing a single stoma (oval body, centre)

Plant stomata, artwork
Plant stomata. Artwork of a section through a leaf showing a stoma (black and grey, upper centre). Stomata are pores in the epidermis of the leaf and the site of gaseous exchange in the plant

Mint leaf surface, SEM
Mint leaf surface. Coloured scanning electron micrograph (SEM) of the surface of a mint (Menta sp.) leaf. The white structures are oil glands

Feverfew leaf surface, SEM
Feverfew leaf surface. Coloured scanning electron micrograph (SEM) of a stoma on the leaf of a feverfew (Tanacetum parthenium) plant

Plant stomata, light micrograph
Plant stomata. Light micrograph of stomatal pores on the surface of a kidney bean (Phaseolus sp.) leaf. The stomata are gaps (white) within two guard cells (blue, kidney-shaped)

Plant stoma, light micrograph
Plant stoma. Light micrograph of a stomatal pore (centre) on the surface of a stinging nettle (Urtica dioica) leaf. The stomata are gaps (white) within two guard cells (kidney-shaped)

Stoma of a pea leaf
False-colour transmission electron micrograph of a stomatal complex in a young leaf of the pea plant, Pisum sativum. The picture shows two developing guard cells separated by a cell wall which will

Open stomata, SEM
Open stomata. Coloured scanning electron micrograph (SEM) of open stomata on the surface of a tobacco leaf (Nicotiana tabacum)

Stomatal complex, TEM
Stomal complex. Coloured transmission electron micrograph (TEM) of a stomatal (pore) complex in the young leaf of the pea plant (Pisum sativum)

Leaf stomata, light micrograph
Leaf stomata. Light micrograph of a vertical section down through the surface of a leaf from a Scots pine tree (Pinus sylvestris)

Daisy leaf surface, SEM
Daisy leaf. Coloured scanning electron micrograph (SEM) of the surface of a daisy leaf (family Asteraceae, formerly Compositae). Three stomata (leaf pores) can be seen

Open stoma, SEM
Open stoma. Coloured scanning electron micrograph (SEM) of an open stoma on the surface of a tobacco leaf (Nicotiana tabacum)

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"Unlocking the Secrets of Guard Cells: A Closer Look at Leaf Pores" Delving into the microscopic world, we explore the intricate realm of guard cells. Through scanning electron microscopy (SEM), we witness nature's remarkable design in English oak leaf pores and French lavender leaf pores, revealing their unique structures. Intriguingly, chives leaf stoma captured under SEM C016/8060 showcases a mesmerizing pattern, while Coltsfoot leaf stomata (SEM C016/8052) exhibit an awe-inspiring arrangement. These images highlight the diversity and beauty found within plant anatomy. Illustrating various cell types alongside guard cells - nerve cells, red blood cells, muscle cells - emphasizes their vital role in sustaining life. The illustration serves as a reminder of the complexity that lies within every living organism. Further exploration takes us to tobacco leaves (SEM C016/9465) and squash leaves (SEM C016/9463), where guard cells stand out with their distinctive shapes and patterns. Thale cress leaves also reveal fascinating stoma formations under SEM C016/9460 and SEM C016/9459. As our journey continues through different plant species such as squash leaves (SEM C016/9464) and sorrel leaves (SEM C016 / 8059), we gain insight into how these plants regulate gas exchange through their specialized guard cells. These captivating images provide a glimpse into the hidden world of plant physiology. By studying guard cells using advanced imaging techniques like ESEM, scientists unravel secrets crucial for understanding how plants adapt to changing environments. Through this visual exploration, we appreciate nature's intricacy on a microscopic level while gaining admiration for the unsung heroes known as guard cells – guardians responsible for maintaining balance within every leaf's ecosystem.