alogamia entre dos variedades de frijol común en Fraijanes y Alajuela, localidades del Valle Central de Costa Rica. La parcela experimental consistió en tres. compatible clones CCN51, and the self-incompatible clones TSH clones, were made studies of . autogamia facultativa (39,,9); alogamia facultativa. Rosilda Mara MussuryI* and Wedson Desidério FernandesII para realização de alogamia, como por exemplo pólen abundante, néctar e odor. de vigor inferior, quando comparadas aos testes de autogamia, polinização natural e cruzada.

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William Collins Sons e Co. The inflorescences and the buttons were sacked 24 h before the floral anthesis, with thin fabric sacks, endowed with breathing pores and observed daily until the obtaining of fruit that were measured in length. Plant Speciation, pp.

Studies of the floral biology and reproductive system of Brassica napus L.(Cruciferae)

Evolution, Diversity, and Mechanisms. Studies of the floral biology and reproductive system of Brassica napus L.

Columbia University PressNew York. In the present work, the smaller anthers of cultivar CTC-4 presented viable pollen. This fact was confirmed through the sacking of the floral button and posterior transformation in fruit.

For the verification of lipid substances in the exina of the pollen grains and the presence of starch, the reagent Sudan III and Lugol were used, respectively Johansen, To observe the fertility of the pollen grains of the smaller anthers, the larger anthers of 20 floral buttons were removed with 0. This was also observed by Almeida and Vidal et al. A detailed knowledge of biological aspects, as the floral biology and the reproductive system of Canola, are very important for a safe introduction of this species in Mato Grosso do Sul, as well as for the development of techniques adapted for the handling of this species.

Brassica napusCanola, floral biology. The pollen was taken from the stigma by means of a dissection needle previously sterilized. To study the reproductive system, six treatments, [ autogamy test, crossed pollination, xenogamy, natural pollination and smaller anthers].


This cutting was made in the place of nectar elimination and it enlarged progressively, resulting approximately in an circular opening, with a variable size. Canola Brassica napus L. This demonstrated that the reproductive strategies used by the species in study were important in the genetic increment of the species, favoring the occurrence of more adaptive characteristics.

In buttons with 0. Reproductive system Table 1 indicates the values obtained for the analysis of the characters in each test. Brassica napus is self pollinated, presenting however, many resources for the allogamy accomplishment, e. Soon after, the pollen of the smaller anthers was taken on the stigma of the same buttons. It held on the corolla with the aid of the legs and it began the cutting of the walls, using the jaws.

The pollen placed on the stigma in the buttons with 0. Blackwell, Introductory Mycology, 4th ed. With the purpose of detecting the essence presence, thirty flowers were placed tightly in closed recipients for a period of 60 minutes and then opened and smelled, according to the technique suggested by Almeida and Dafni This is one of the requirements for the increment of the vegetable production, with the advantage of they present better condition to complete the biological cycle in adverse conditions.

Services on Demand Journal. The development of the fruit was daily accompanied. That indicates that there is a larger amount of nutritional reserve in the seed, favoring the germination and the development of the plant seeds. Table 1 indicates the values obtained for the analysis of the characters in each test.

Crossed pollination The crossed pollination was evaluated in 20 floral buttons, emasculated before the dehiscence of the anthers. Evolution above the Species Level. Eisikowtichshowed that the wind can help the auto-pollination. These differences alobamia added in order to increase the development of important evolutionary characteristics for the species, as size of the fruit, number of seeds, and others.

Biology of the post-anthesis phase In the alogamis post-anthesis phase, the secretion of the nectaries was quite reduced, and the anthers, petals and sepals wither dropping soon after, with the remaining of the stigma that accompanies the fruit until the next ripening.


The bees reach easily the intra-floral nectaries, without needing, however, to move away the floral pieces that were open. Self- and cross-fertilization in plants. Apomixis in the angiosperms.

TALLER #8 by Jesús Riascos on Prezi

Immediately after the anthesis, the flowers were pollinated. Studies of the floral biology of canola were accomplished with the objective of enlarging the system and reproductive strategies knowledge of its CTC-4 cultivar in Dourados, Centerwest, Brazil. Diversity and evolutionary biology of tropical flowers Cambridge tropical biology series.

For each test, the following characters were appraised: Seeds of Brassica napus were used cultivar CTC-4sowed with spacing of 20 cm among the arrays and with 12 plants for linear meter. N’otros proyeutos Wikimedia Commons. The following characteristics were observed: Vistes Lleer Editar Editar la fonte Ver historial.

Biology of the anthesis phase In the second phase, the flower reached the mean size auogamia 1. In agreement with the size of the hole, Trigona sp. The xenogamy tests were totally accomplished in 25 buttons emasculated before the dehiscence of the anthers. This happened probably, due to the manipulation accomplished in the floral button and in the stigma, during the emasculation and the pollen deposit.

Chrysomelidaeand Trigona sp.

Reproducción vexetal

La autogamia ta bien espublizada ente les malecesles plantes pioneres y les especies insulares, que precisen que los individuos aisllaos fructifiquen y produzan granes. Apomixis in higher plants. Similar results were observed during the anthesis phase when there was a decrease of the starch in flowers autogamiw 1. Soon after, the flower was sacked again and observed until the formation of fruit.