Plant Image Collection

Media list

Various kind of media

Title The file Description Additional data Media type Collection Actions
14-011h 14-011h Two stages in sieve plate development: plasmodesmal stage and plasmodesmata partly lined with callose. (Nicotiana tabacum root tip) copyright: Katherine Esau, BSA
license: http://images.botany.org/index.html#license
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14-012h 14-012h Young wall with plasmodesmata (top); sieve plate elements (left) and companion cells (right). Early stage of callose accumulation visible at ends of a plasmodesma, near differentiating pore site. (Echium angustifolium and E. sabulicola petioles) copyright: Katherine Esau, BSA
license: http://images.botany.org/index.html#license
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14-013h 14-013h Further development of a pore site in longitudinal view. Callose nearly fused at middle lamella, plasmalemma and ER cisternae cover the callose, plasmodesma extends from ER to ER through future pore. (Echium angustifolium petiole) copyright: Katherine Esau, BSA
license: http://images.botany.org/index.html#license
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14-014h 14-014h Continuous callose and plasmalemma in former plasmodesmal canal (above). Most callose was removed and open pores partly occluded with P-protein. (Echium angustifolium petioles) copyright: Katherine Esau, BSA
license: http://images.botany.org/index.html#license
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14-015h 14-015h Left, plugs of callose, penetrated by plasmodesmata, fill the pores. Right, pores open, lined with thin layer of callose, and most are occluded with P-protein, some with starch grains. (Echium wildpreti petioles) copyright: Katherine Esau, BSA
license: http://images.botany.org/index.html#license
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14-016h 14-016h P-protein plug in pore in longitudinal section. Compaction of P-protein within pore especially through middle lamella region. Echium judaeum petiole copyright: Katherine Esau, BSA
license: http://images.botany.org/index.html#license
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14-017h 14-017h Cross sections through pores filled with P-protein and through masses of loose P-protein located at some distance from the sieve plate. Echium plantagineum petioles. copyright: Katherine Esau, BSA
license: http://images.botany.org/index.html#license
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14-018h 14-018h P-protein digestion with pepsin (left); control (right). Compacted P-protein within the sieve plate pore became digested. (Echium judaeum petiole) copyright: Katherine Esau, BSA
license: http://images.botany.org/index.html#license
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14-019h 14-019h Longitudinal section of cell wall including a plasmodesma connecting a sieve element (below) and branched plasmodesma located on the companion cell side of the wall. (Echium rosulatum petiole) copyright: Katherine Esau, BSA
license: http://images.botany.org/index.html#license
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14-020h 14-020h Primary xylem of Phaseolus vulgaris stem, with ring-like and helical secondary walls (close to bottom of slide). Secondary wall surrounds perforations at the two ends of an individual vessel member. Perforations are formed by localized removal of the primary wall. copyright: Katherine Esau, BSA
license: http://images.botany.org/index.html#license
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14-021h 14-021h Removal of vessel end wall with middle part consisting of primary wall material. Around the end wall margin, secondary wall material protects unthickened primary wall, which becomes hydrolyzed and disappear. This stage is shown below: the rim now surrounds a perforation. (Phaseolus vulgaris stem) copyright: Katherine Esau, BSA
license: http://images.botany.org/index.html#license
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14-022h 14-022h Unperforated vessel wall parts also undergo a change; primary wall not covered by secondary wall layers undergoes partial hydrolysis. Beta vulgaris leaf. copyright: Katherine Esau, BSA
license: http://images.botany.org/index.html#license
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14-023h 14-023h Primary wall between contiguous vessel members (right) is partially hydrolyzed between secondary thickening gyres. Noncellulosic wall components removed, cellulose forms a loose network. Hydrolysis affects primary wall adjacent to vessel member. (Capsella bursa pastoris leaf) copyright: Katherine Esau, BSA
license: http://images.botany.org/index.html#license
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14-024h 14-024h Scanning electron microscograph of vessel member from Pelargonium leaf with perforations and pits. Micrograph, courtesy of Professor Peter B. Kaufman and Dr. P Dayanandan, Dept. of Botany, Univ. of Michigan, Ann Arbor, MI. copyright: Katherine Esau, BSA
license: http://images.botany.org/index.html#license
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15-001h 15-001h Prophase. Onion root tip cell [right] in mid-prophase. Note breakdown of nuclear envelope and condensation of chromosomes. Newly-formed daughter cells [left] copyright: Scott Russell, BSA
license: http://images.botany.org/index.html#license
Image Mitosis Quick view Details
15-002h 15-002h Metaphase. Chromosomes are aligned on the metaphase plate copyright: Scott Russell, BSA
license: http://images.botany.org/index.html#license
Image Mitosis Quick view Details
15-003h 15-003h Anaphase A. Chromosomes separate, migrating from the metaphase plate to the poles of the cell copyright: Scott Russell, BSA
license: http://images.botany.org/index.html#license
Image Mitosis Quick view Details
15-004h 15-004h Anaphase B. Chromosomes have separated. In Anaphase B, the spindle poles separate and become more distant copyright: Scott Russell, BSA
license: http://images.botany.org/index.html#license
Image Mitosis Quick view Details
15-005h 15-005h Telophase. Nuclear division is complete, awaiting cytokinesis copyright: Scott Russell, BSA
license: http://images.botany.org/index.html#license
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15-006h 15-006h Two cells: Late-metaphase cell on the left. A gravitropic sensing root cell with statocytes on the right copyright: Scott Russell, BSA
license: http://images.botany.org/index.html#license
Image Mitosis Quick view Details