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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Flight path of pollinators foraging on impatiens : decision rules and their implications for gene flow

Dubé, Denis January 1989 (has links)
No description available.
2

Flight path of pollinators foraging on impatiens : decision rules and their implications for gene flow

Dubé, Denis January 1989 (has links)
No description available.
3

De betekenis van de biotische bestuiving bij Plantago lanceolata

Stelleman, Paul. January 1982 (has links)
Thesis (Ph. D.)--Universiteit van Amsterdam, 1982. / Summary also in English. Includes bibliographical references (p. 168-175).
4

Effects of nectar robbing by Xylocopa californica on Chilopsis linearis (Bignoniaceae)

Pfister, Rachel Walker, 1940- January 1989 (has links)
The interaction between Xylocopa californica and Chilopsis linearis was used to test the hypothesis that nectar robbing is costly to plants. No evidence for these costs, either in terms of decreased pollination or increased energy demands, was found. In fact, the mean number of seeds per fruit and the mean individual weight of seeds per fruit was higher from fruits that developed from robbed flowers than from fruits that developed from unrobbed flowers, indicating that the presence of Xylocopa californica enhanced pollination. Chilopsis linearis pollen was isolated from the tips of the abdomens of robbing Xylocopa californica and it was determined that these bees could be transferring pollen from flower to flower as they position themselves to rob. This association was found to be one of mutual benefit rather than one of exploitation.
5

Vibração de plantas de pimenta (capsicum sp) para produção de frutos e sementes em ambiente protegido

Freitas, Pâmela Gomes Nakada [UNESP] 11 April 2014 (has links) (PDF)
Made available in DSpace on 2014-08-13T14:51:01Z (GMT). No. of bitstreams: 0 Previous issue date: 2014-04-11Bitstream added on 2014-08-13T17:59:33Z : No. of bitstreams: 1 000776705.pdf: 1027064 bytes, checksum: 1d57e73264475f2533e3cd28655a1ddd (MD5) / Os insetos polinizadores realizam a vibração das flores para liberação do pólen atuando na fecundação dos óvulos para formação de sementes e desenvolvimento dos frutos. Neste sentido, objetivou-se verificar o efeito da vibração de plantas na produção de frutos e sementes de pimenta americana em cultivo protegido com laterais aberta e fechada. O experimento foi realizado na Fazenda Experimental da Unesp/FCA localizada no município de São Manuel-SP. Foram seis tratamentos, em esquema de parcelas subdivididas, sendo as duas parcelas a vibração ou não das plantas e as subparcelas três cultivares de pimenta (Dirce, Dínamo e Doce Comprida). As plantas eram vibradas balançando-se o arame onde se prendia o tutor de bambu com a mão por cerca de 5 segundos, duas vezes por dia. O delineamento foi em blocos ao acaso, com três repetições. O mesmo experimento foi realizado em dois ambientes: com e sem fechamento das laterais com tela. As características avaliadas foram: massa e número de frutos totais e comerciais (sem defeitos aparentes) por planta; porcentagem de frutos comerciais; massa, diâmetro e comprimento de fruto; massa e número de sementes por fruto; e altura de planta. A produção de frutos foi maior no ambiente com as laterais fechadas, com 24 frutos comerciais por planta enquanto no ambiente aberto foram sete. A vibração de plantas de pimentas americanas não afetou a produção, comprimento, diâmetro e massa média de frutos. Apenas para a cultivar Doce Comprida obteve-se maior produção de sementes por fruto no ambiente aberto em relação ao ambiente fechado, na ausência de vibração das plantas, com média de 259 e 126 sementes por fruto, respectivamente. A vibração em ambiente fechado beneficiou a cultivar Doce Comprida. / The pollinators produce the vibration of flowers to release pollen to fertilize the eggs cells for seed formation and fruit development. In this sense, it is aimed to verify the effect of the vibration of plants in the production of american pepper protected with open and closed sides cultivation. The experiment was conducted at the Experimental Farm of UNESP/FCA located in the city of São Manuel-SP. There were six treatments in a split plot design, with two instalments, one with vibration and other without vibration of the plants in subplots the three cultivars (Dirce, Dínamo and Doce Comprida). The plants were vibrated shooking on the wire where it attaches the tutor (bamboo cane) by hand for about 5 seconds, twice a day. The design was a randomized block design with three replications. The same experiment was conducted in two environments: with and without closing the sides. The characteristics were evaluated: weight and number of total and marketable fruit (no visible defects) per plant, percentage of marketable fruits; mass, diameter and fruit length , weight and number of seeds per fruit , and plant height. Fruit production was much higher in the environment with closed sides with 24 marketable fruits per plant while in open areas there were seven. The vibration of plants of american peppers did not affect yield, length, diameter and average fruit weight. Just cultivating Doce Comprida gave higher seed production per fruit in the open environment in relation to confinement, in the absence of plant vibration, averaging 259 and 126 seeds per fruit, respectively. The vibration indoors benefited cultivar Doce Comprida.
6

Vibração de plantas de pimenta (capsicum sp) para produção de frutos e sementes em ambiente protegido /

Freitas, Pâmela Gomes Nakada, 1982. January 2014 (has links)
Orientador: Antonio Ismael Inácio Cardoso / Banca: João Nakagawa / Banca: Edvaldo Aparecido Amaral da Silva / Banca: Felipe Oliveira Magro / Banca: Luiz Antonio Augusto Gomes / Resumo: Os insetos polinizadores realizam a vibração das flores para liberação do pólen atuando na fecundação dos óvulos para formação de sementes e desenvolvimento dos frutos. Neste sentido, objetivou-se verificar o efeito da vibração de plantas na produção de frutos e sementes de pimenta americana em cultivo protegido com laterais aberta e fechada. O experimento foi realizado na Fazenda Experimental da Unesp/FCA localizada no município de São Manuel-SP. Foram seis tratamentos, em esquema de parcelas subdivididas, sendo as duas parcelas a vibração ou não das plantas e as subparcelas três cultivares de pimenta (Dirce, Dínamo e Doce Comprida). As plantas eram vibradas balançando-se o arame onde se prendia o tutor de bambu com a mão por cerca de 5 segundos, duas vezes por dia. O delineamento foi em blocos ao acaso, com três repetições. O mesmo experimento foi realizado em dois ambientes: com e sem fechamento das laterais com tela. As características avaliadas foram: massa e número de frutos totais e comerciais (sem defeitos aparentes) por planta; porcentagem de frutos comerciais; massa, diâmetro e comprimento de fruto; massa e número de sementes por fruto; e altura de planta. A produção de frutos foi maior no ambiente com as laterais fechadas, com 24 frutos comerciais por planta enquanto no ambiente aberto foram sete. A vibração de plantas de pimentas americanas não afetou a produção, comprimento, diâmetro e massa média de frutos. Apenas para a cultivar Doce Comprida obteve-se maior produção de sementes por fruto no ambiente aberto em relação ao ambiente fechado, na ausência de vibração das plantas, com média de 259 e 126 sementes por fruto, respectivamente. A vibração em ambiente fechado beneficiou a cultivar Doce Comprida. / Abstract: The pollinators produce the vibration of flowers to release pollen to fertilize the eggs cells for seed formation and fruit development. In this sense, it is aimed to verify the effect of the vibration of plants in the production of american pepper protected with open and closed sides cultivation. The experiment was conducted at the Experimental Farm of UNESP/FCA located in the city of São Manuel-SP. There were six treatments in a split plot design, with two instalments, one with vibration and other without vibration of the plants in subplots the three cultivars (Dirce, Dínamo and Doce Comprida). The plants were vibrated shooking on the wire where it attaches the tutor (bamboo cane) by hand for about 5 seconds, twice a day. The design was a randomized block design with three replications. The same experiment was conducted in two environments: with and without closing the sides. The characteristics were evaluated: weight and number of total and marketable fruit (no visible defects) per plant, percentage of marketable fruits; mass, diameter and fruit length , weight and number of seeds per fruit , and plant height. Fruit production was much higher in the environment with closed sides with 24 marketable fruits per plant while in open areas there were seven. The vibration of plants of american peppers did not affect yield, length, diameter and average fruit weight. Just cultivating Doce Comprida gave higher seed production per fruit in the open environment in relation to confinement, in the absence of plant vibration, averaging 259 and 126 seeds per fruit, respectively. The vibration indoors benefited cultivar Doce Comprida. / Doutor

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