Seleção de clones de cajueiro-anão para o plantio comercial no estado do Ceará

Barros, Levi de Moura; Cavalcanti, J. J. V.; Paiva, João Rodrigues de; Crisóstomo, João Ribeiro; Corrêa, Maria Pinheiro Fernandes; Lima, Adman Câmara Soares

doi:10.1590/s0100-204x2000001100011

Cited by 14 publications

(10 citation statements)

References 2 publications

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“…Furthermore, cultivation with a single genotype is not advisable because the orchards without genetic variability can be exterminated by new diseases and pests. However, knowledge from new tree genotypes is limited to aspects such as plant height, nut yield, nut weight, kernel weight and weight of kernel/weight of nut ratio (Barros et al, 2000;Cavalcanti et al, 2000;Paiva et al, 2004). The chemical composition and nutritional aspects of kernels from new genotypes have been mostly disregarded.…”

Section: Introductionmentioning

confidence: 99%

“…The chemical composition and nutritional aspects of kernels from new genotypes have been mostly disregarded. Furthermore, the nut's chemical composition has been found to vary significantly among different tree genotypes and environmental conditions (Barros et al, 2000;Cavalcanti et al, 2000). On the other hand, cashew nut processing involves a number of steps that yields about 40% of broken kernels with lower commercial value than that of the whole kernel.…”

Section: Introductionmentioning

confidence: 99%

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Chemical composition and fatty acid profile of kernels from different Brazilian cashew tree genotypes

Lima¹,

Nobre²,

Magalhães³

et al. 2015

Afr. J. Food Sci.

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Kernels from nine cashew tree genotypes were characterized with respect to their chemical composition and fatty acids profile, peroxide value and free fatty acids content of the extracted oil. Their proximate composition ranged from 2.69 to 8.37% for moisture, 17.50 to 24.49% for proteins, 39.88 to 47.10% for lipids, 27.14 to 34.94% for total carbohydrate and 2.74 to 4.14% for ash. The amounts of free fatty acids in the oils were smaller than 0.55% for all genotypes tested and no peroxides were detected. Oleic acid was the most abundant fatty acid in kernel oils, ranging from 57.66 to 67.12%. The genotypes that showed higher lipid contents and smaller carbohydrate contents among all genotypes tested were CCP09, EMB51, BRS226 and CCP1001. Those genotypes can be regarded as potential sources of high quality vegetable oil.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Chemical composition and fatty acid profile of kernels from different Brazilian cashew tree genotypes

Lima¹,

Nobre²,

Magalhães³

et al. 2015

Afr. J. Food Sci.

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“…Cashew is a cross-pollinated plant and usually propagated from nuts, thus wide genetic variability among the open-pollinated progenies has resulted in poor yields [7][8][9]. However, with regard to large-scale propagation and conservation of selected genetic characters, sexual reproduction and out-breeding pose a risk of losing valued desirable quality characteristics across generations.…”

Section: Introductionmentioning

confidence: 99%

“…However, with regard to large-scale propagation and conservation of selected genetic characters, sexual reproduction and out-breeding pose a risk of losing valued desirable quality characteristics across generations. Studies have shown that only 20% of trees planted from open population seeds produce 80% of the yield from a hectare of cashew [8,9] which, therefore, becomes a limitation for establishing economically viable commercial orchards. Hence, vegetative propagation offers an opportunity by which quality characteristics of desirable mother trees can be maintained perpetually, thus becoming the preferred choice for raising cashew propagules [10].…”

Section: Introductionmentioning

confidence: 99%

Can auxins improve rooting of propagules and establishment of cashew clones?

Aliyu¹,

Dada²,

Hammed³

2010

Fruits

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-Introduction. Cashew production has been on a decline due to poor yield resulting from poor quality traits of open-pollinated seedling populations that were used to establish plantations. Clones established from outstanding individuals through air-layering root poorly and are not likely to survive transplanting, thus clonal propagation by air-layering has been of little value for cashew propagation. Materials and method. To improve the rooting percentages of air-layering, three auxins (IBA, NAA and IAA) were applied at six concentrations [(0, 1, 2, 3, 4 and 5)%] on four cashew genotypes. Results and discussion. Significant improvement was recorded in terms of layer take, number of roots per layer, number of days to rooting, length of roots and percentage of surviving clones after transplanting. Improvement varied between the different auxins, concentrations and genotypes. We observed that degree of rooting was genotype-specific and influenced by auxin type and specific concentration. Our data showed that, among the auxins tested, IBA was most effective, with optimum performance at the 2% concentration. Conclusion. Using auxins made it possible to significantly improve the rooting and survival of cashew propagules; however, to achieve sufficient rooting and better establishment after transplanting, auxin treatment should not exceed 3% concentration. This intervention would help alleviate the problem of clonal establishment in cashew. Nos résultats ont montré que, des trois auxines testées, l'AIB était la plus efficace avec un effet optimal à une concentration de 2 %. Conclusion. L'utilisation des auxines a permis d'améliorer significativement l'enracinement et la survie des marcottes d'anacardiers ; toutefois, pour obtenir un enracinement suffisant et une meilleure reprise après repiquage, l'auxine ne devrait pas être appliquée à une concentration supérieure à 3 %. Cette intervention permettrait de réduire le problème de l'établissement des anacardiers au champ.Nigéria / Anacardium occidental /multiplication végétative / marcottage / auxine / établissement de la plante

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“…Commercially important orchards are also found in the Eastern and Western Coasts of Africa, Northern Australia, Fiji Islands, Hawaii and Southern Florida (Lima, 1988). In Brazil, low crop productivity has been attempted to be solved with the introduction of new commercial dwarf clones with high productivity associated to precocious production (Barros et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

Photosynthetic responses of young cashew plants to varying environmental conditions

Souza

Ribeiro

Machado

et al. 2005

Pesq. agropec. bras.

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-The aim of this study was to characterize gas exchange responses of young cashew plants to varying photosynthetic photon flux density (PPFD), temperature, vapor-pressure deficit (VPD), and intercellular CO 2 concentration (C i ), under controlled conditions. Daily courses of gas exchange and chlorophyll a fluorescence parameters were measured under natural conditions. Maximum CO 2 assimilation rates, under optimal controlled conditions, were about 13 mmol m -2 s -1, with light saturation around 1,000 mmol m -2 s -1. Leaf temperatures between 25 o C and 35 o C were optimal for photosynthesis. Stomata showed sensitivity to CO 2 , and a closing response with increasing C i . Increasing VPD had a small effect on CO 2 assimilation rates, with a small decrease above 2.5 kPa. Stomata, however, were strongly affected by VPD, exhibiting gradual closure above 1.5 kPa. The reduced stomatal conductances at high VPD were efficient in restricting water losses by transpiration, demonstrating the species adaptability to dry environments. Under natural irradiance, CO 2 assimilation rates were saturated in early morning, following thereafter the PPFD changes. Transient F v /F m decreases were registered around 11h, indicating the occurrence of photoinhibition. Decreases of excitation capture efficiency, decreases of effective quantum yield of photosystem II, and increases in non-photochemical quenching were consistent with the occurrence of photoprotection under excessive irradiance levels.Index terms: Anacardium occidentale, gas exchange, chlorophyll fluorescence, temperature, vapor-pressure deficit. Respostas da fotossíntese à variação das condições ambientais em plantas jovens de cajueiroResumo -O objetivo deste trabalho foi caracterizar as respostas das trocas gasosas de plantas jovens de cajueiro à densidade de fluxo de fótons fotossintético (DFFF), temperatura, déficit de pressão de vapor (DPV) e concentração interna de CO 2 (C i ), sob condições controladas. Cursos diários das trocas gasosas e de variáveis de fluorescência da clorofila a foram obtidos sob condições naturais. A taxa de assimilação de CO 2 máxima foi de cerca de 13 mmol m -2 s -1, com saturação pela luz em torno de 1.000 mmol m -2 s -1. As temperaturas das folhas entre 25 o C e 35 o C corresponderam à faixa ótima para a fotossíntese. Os estômatos mostraram-se sensíveis ao CO 2 e se fecharam com aumentos de C i . Aumentos do DPV exerceram pequeno efeito sobre a taxa de assimilação de CO 2 , com uma pequena diminuição acima de 2,5 kPa. Os estômatos, no entanto, foram fortemente afetados pelo DPV, com fechamento gradativo acima de 1,5 kPa. As condutâncias estomáticas, reduzidas em altos DPVs, foram eficientes em restringir as perdas de água pela transpiração e demonstraram adaptação da espécie a ambientes secos. Sob irradiância natural, a taxa de assimilação de CO 2 apresentou saturação no início da manhã, variando posteriormente com as variações da DFFF. Decréscimos transientes da razão F v /F m foram registrados em torno de 11h, o que indica a ocorr...

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Seleção de clones de cajueiro-anão para o plantio comercial no estado do Ceará

Cited by 14 publications

References 2 publications

Chemical composition and fatty acid profile of kernels from different Brazilian cashew tree genotypes

Chemical composition and fatty acid profile of kernels from different Brazilian cashew tree genotypes

Can auxins improve rooting of propagules and establishment of cashew clones?

Photosynthetic responses of young cashew plants to varying environmental conditions

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