Net alignment of cellulose in the periclinal walls of the shoot apex surface cells in Kalanchoe blossfeldiana. II. Flower development

Dome geometry and the pattern of net cellulose alignment in the periclinal walls of the surface cells of Kalanchoe blossfeldiana were examined during sequential stages of flower development. Floral apices of photoperiodically induced plants were dissected, stained, and observed under a dissecting microscope. The outermost cell layer(s) of the surface was surgically removed from the floral apex and viewed under a polarizing microscope. Correlations were found between the geometry of the dome, the pattern of cellulose in the surface cells, and the pattern of initiation of floral organs at the apex. Tangentially aligned cellulose was always observed around the periphery of the floral dome, whereas no net alignment of cellulose typically occurred in the centermost region. Circumferential reinforcement of cellulose was consistently observed at sites of incipient organ initiation, and the pattern of cellulose alignment on emerging primordia correlated with the type of organ development. No strict dependence was evident between the number and positioning of one whorl of floral ogans and that of the previous whorl. Key words: shoot, cellulose, flower, floral, organogenesis.

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Net alignment of cellulose in the periclinal walls of the shoot apex surface cells in Kalanchoe blossfeldiana. I. Transition from vegetative to reproductive morphogenesis

Canadian Journal of Botany ◽

10.1139/b90-337 ◽

1990 ◽

Vol 68 (12) ◽

pp. 2668-2677 ◽

Cited By ~ 1

Author(s):

Amy J. Nelson

Keyword(s):

Key Words ◽

Shoot Apex ◽

Cell Layer ◽

Developmental State ◽

Floral Transition ◽

Stem Apex ◽

Kalanchoe Blossfeldiana ◽

Periclinal Walls ◽

Circumferential Reinforcement ◽

Kalanchoë Blossfeldiana

The apical dome geometry and the pattern of net cellulose alignment in the periclinal walls of the surface cells of Kalanchoe blossfeldiana were examined during vegetative morphogenesis, during reproductive morphogenesis, and during the transition between the two development states. Photoperiodically induced and noninduced shoot apices were dissected, stained, and viewed under a dissecting microscope. The surface cell layer(s) was removed from the stem apex and examined under a polarizing microscope. The results indicated that correlations exist between the pattern of cellulose alignment on the apex surface and the pattern of organ initiation. Tangential cellulose alignment is always present at the periphery of the shoot apex, and alignment of cellulose at the incipient sites of organ formation is such as to provide circumferential reinforcement for emerging organs. The results also showed that a change in dome geometry is one of the earliest events during the floral transition. This change in geometry is correlated with a change in the pattern of surface cellulose and leads to a change in the developmental state of the apex. Key words: shoot, phyllotaxis, cellulose, flower, organogenesis.

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First Report of Powdery Mildew of Kalanchoe blossfeldiana caused by Sphaerotheca fuliginea (Podosphaera fuliginea) in the Pacific Northwest

Plant Health Progress ◽

10.1094/php-2003-0417-02-hn ◽

2003 ◽

Vol 4 (1) ◽

pp. 39

Author(s):

Dean A. Glawe ◽

Rita Hummel ◽

Grace Jack

Keyword(s):

Powdery Mildew ◽

Pacific Northwest ◽

Sphaerotheca Fuliginea ◽

First Report ◽

Major Disease ◽

The Pacific ◽

Kalanchoe Blossfeldiana ◽

Extension Center ◽

Kalanchoë Blossfeldiana

Kalanchoe blossfeldiana Poelln. is a common ornamental houseplant. Although powdery mildew is a major disease of this species, there are no published reports of it in the Pacific Northwest. In August, 2002, powdery mildew was observed on six indoor K. blossfeldiana plants in an office and adjacent laboratory at the Puyallup Research and Extension Center. Accepted for publication 25 March 2003. Published 17 April 2003.

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Ontogenetical and experimental studies of the floral apex of Portulaca grandiflora. 1. Histology of transformation of the shoot apex into the floral apex

Canadian Journal of Botany ◽

10.1139/b69-017 ◽

1969 ◽

Vol 47 (1) ◽

pp. 133-140 ◽

Cited By ~ 8

Author(s):

Siti Raswati Soetiarto ◽

Ernest Ball

Keyword(s):

Shoot Apex ◽

Experimental Studies ◽

Floral Meristem ◽

Vegetative Shoot ◽

Floral Organs ◽

Mature Flower ◽

Floral Apex ◽

Portulaca Grandiflora ◽

Floral Primordia ◽

Vegetative Shoot Apex

The vegetative apex was a low dome consisting of two layers of tunica surmounting a very small corpus. Foliar primordia originated as periclines in the flanks of T2. The transition apex became first a steep cone and then a hemisphere. All floral primordia—the two bracts, the two sepals, the several whorls of petals, the several whorls of stamens, and the carpels—originated in the manner of leaves, as periclines in T2 on the flanks of the apex. All appendages, including carpels, were therefore lateral. In the early transition, the apex had a brief stage in which there were three tunica layers, but the inner one was lost with the onset of the sepals. The bracts and the first sepal continued the normal positions of primordia for the vegetative phyllotaxy of 3/8, but with the second sepal, this phyllotaxy was lost, and petals, stamens, and carpels were produced in whorls. While leaves, bracts, sepals, and petals were produced in acropetal sequence, stamens were produced in basipetal sequence, and carpels appeared simultaneously. After carpels were formed, the rest of the floral apex underwent a brief period of expansion growth, achieving a diameter comparable to that of a shoot apex, but its substance was eventually incorporated into the carpel margins, which later produced the ovules. This agrees with the determinate nature of the floral apex. During the development of the first series of floral organs, the floral apex underwent continued increase in area, finally achieving a diameter several times that of the vegetative shoot apex. Its size and form were such that they were compared to those of some inflorescence apices. After development of the first series of floral organs, the subjacent tissues to the floral meristem underwent divisions and elongation at right angles to the axis, causing at first a flattening of the meristem, and eventually a cup-shaped form, with the carpels attached in the bottom of a bowl. The mature flower was thus perigynous, but this development arose quite differently from the perigyny as it is known from ontogenetic studies in the Rosaceae.

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Antiplasmid Potential of Kalanchoe blossfeldiana Against Multidrug Resistance Pseudomonas aeruginosa

British Journal of Pharmacology and Toxicology ◽

10.19026/bjpt.5.5184 ◽

2014 ◽

Vol 5 (6) ◽

pp. 177-185

Author(s):

ZirakFaqe Ahmed Abdulrahman

Keyword(s):

Pseudomonas Aeruginosa ◽

Multidrug Resistance ◽

Kalanchoe Blossfeldiana ◽

Kalanchoë Blossfeldiana

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Uso del fertilizante (15-20-25) en la etapa de floración de Kalanchoe blossfeldiana

Revista Biológico Agropecuaria Tuxpan ◽

10.47808/revistabioagro.v5i2.124 ◽

2017 ◽

Vol 5 (2) ◽

pp. 114-118

Author(s):

Ana Cristina Noriega Lucio ◽

Darío López Castro ◽

Rocío Rodríguez Cabrera ◽

Sergio Omar Nieto Rosaliano ◽

Pablo Elorza Martínez

Keyword(s):

Kalanchoe Blossfeldiana ◽

El Alto ◽

Kalanchoë Blossfeldiana

Se evaluaron 4 dosis del fertilizante 15-20-25 fueron 2, 3, 4 y 5 gramos por litro de agua más un testigo. El objetivo fue Determinar la mejor dosis de 15-20-25 para favorecer la floración de Kalanchoe blossfeldiana. Los resultados mostraron que la variable Contenido de clorofila a los 90 días el mejor tratamiento fue el No. 4, con54.95 unidades SPAD, con una diferencia significativa del tratamiento 5 que fue el testigo con 44.64. En la variable de Diámetro de tallo el tratamiento que tuvo mejor resultado fue el tratamiento 2 con 0.741 centímetro, teniendo una diferencia significativa con el testigo. En la variable de número de hojas, el Tratamiento que tuvo mayor número fue el 4 con un total de 20 hojas. En este sentido vemos que el tratamiento que funcionó de mejor manera y que obtuvo mayor contenido de clorofila, mayor diámetro de tallo y numero de hojas fue el tratamiento No. 4, con una dosis de 5 gramos por litro, donde se pudo observar plantas vigorosas de hojas gruesas y color verde obscuro por el alto contenido de nitrógeno registrado en la planta siendo además las que primero iniciaron la etapa de floración y mejor calidad de ramo floral.

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