Some aspects of citrus ecophysiology in subtropical climates: re-visiting photosynthesis under natural conditions

Ribeiro, Rafael Vasconcelos; Machado, Eduardo Caruso

doi:10.1590/s1677-04202007000400009

Cited by 74 publications

(102 citation statements)

References 86 publications

(197 reference statements)

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“…It must be mentioned her that the heaviest horn dry wt was obtained from plants produced from seeds treated by 40Gy Zn1. Similar results on plant growth were obtained by Orabi (1998), Ribeiro and Machado (2007) and Hussein (2008) upon exposing seeds to different doses of γ-rays, all growth parameters (shoot length, number of pods/ plant, number of seeds/ plant and their wt) increased above control. Hassan et al (2000) examined the effect of 20, 40, 60 and 80Gy gamma irradiation doses on growth of cowpea.…”

Section: Effect Of γ-Rays and Some Microelements On Physical Parameterssupporting

confidence: 83%

Effect of Gamma Irradiation Doses and Micro Elements on Some Physical, Chemical and Crop Parameters of Vigna sinensis L.

2011

Egypt. J. Rad.Sci.

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HE present work aim to expose Vigna sinensis L. (cowpea) seeds to γ-rays at dose levels 40, 80 and 120Gy and to spray the growing plants with micro elements; boron (B) and zinc (Zn) after one month of planting; until harvest date, for increasing crop quality and quantity. Some physical parameters, some chemical analysis, the yield and net percentage of the produced crop were evaluated. The result obtained refer that, the 40Gy dose enhanced most of physical, chemical and yield parameters of cowpea crop. Moreover, the harvested crop was increased and improved in case of those produced from plants sprayed with different concentrations of B or Zn plus 40 Gy dose as compared with the other treatments used followed by the dose of 80Gy. Meanwhile, the dose of 120Gy gave the least enhancement on the quality and quantity of the aforementioned treatments in cowpea crop.

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Section: Effect Of γ-Rays and Some Microelements On Physical Parameterssupporting

confidence: 83%

Effect of Gamma Irradiation Doses and Micro Elements on Some Physical, Chemical and Crop Parameters of Vigna sinensis L.

2011

Egypt. J. Rad.Sci.

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“…Therefore, in the climate conditions one rainfed cultivation evaluated in this study (Figure 1), the 'Tuxpan Valencia' orange had more than on blossom per year, hence up to four harvests per year, without a defined harvest period, as typically occurs in citrus grown in tropical climate (RIBEIRO and MACHADO, 2007).…”

Section: Resultsmentioning

confidence: 78%

Performance of ‘Tuxpan Valencia’ Sweet Orange Grafted Onto 14 Rootstocks in Northern Bahia, Brazil

et al. 2016

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-In the State of Bahia, Brazil, the citrus industry is located on the north coast with the prevalence of the combination 'Pera' sweet orange on 'Rangpur' lime. Scion-rootstock diversification may contribute to the increase of yield and the extension of harvest season, as long as to decrease the risk associated to abiotic and biotic stresses. Therefore, the performance of 'Tuxpan Valencia' sweet orange grafted onto 14 rootstocks was evaluated in Rio Real -BA. Planting was performed in 2006 under rainfed cultivation on cohesive ultisol and tree spacing of 6.0 m x 4.0 m. Tree size, yield and fruit quality were evaluated in the period of

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“…Leaves of the same canopy often show different rates of photosynthesis and transpiration. Therefore, estimations of leaf area linked to physiological characteristics are essential to define the overall contribution of each canopy portion to fruit quality and yield [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

A simple and non-destructive model for individual leaf area estimation in citrus

Mazzini¹,

Ribeiro²,

Pio³

2010

Fruits

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-Introduction. Leaf area is often related to plant growth, development, physiology and yield. Many non-destructive models have been proposed for leaf area estimation of several plant genotypes, demonstrating that leaf length, leaf width and leaf area are closely correlated. Thus, the objective of our study was to develop a reliable model for leaf area estimation from linear measurements of leaf dimensions for citrus genotypes. Materials and methods. Leaves of citrus genotypes were harvested, and their dimensions (length, width and area) were measured. Values of leaf area were regressed against length, width, the square of length, the square of width and the product (length × width). The most accurate equations, either linear or secondorder polynomial, were regressed again with a new data set; then the most reliable equation was defined. Results and discussion. The first analysis showed that the variables length, width and the square of length gave better results in second-order polynomial equations, while the linear equations were more suitable and accurate when the width and the product (length × width) were used. When these equations were regressed with the new data set, the coefficient of determination (R 2 ) and the agreement index 'd' were higher for the one that used the variable product (length × width), while the Mean Absolute Percentage Error was lower. Conclusion. The product of the simple leaf dimensions (length × width) can provide a reliable and simple non-destructive model for leaf area estimation across citrus genotypes. Résumé -Introduction. La surface foliaire est souvent liée à la croissance, le développement, la physiologie et le rendement des plantes. Beaucoup de modèles non destructifs ont été proposés pour estimer la surface foliaire de plusieurs génotypes végétaux ; ils ont montré que la longueur et la largeur des feuilles, de même que la surface foliaire, étaient étroitement corrélées. L'objectif de notre étude a donc été de développer un modèle fiable pour estimer la surface foliaire à partir de mesures linéaires des dimensions de feuilles pour les génotypes d'agrumes. Matériel et méthodes. Les feuilles de certains génotypes d'agrumes ont été récoltées et leurs dimensions (longueur, largeur et surface) ont été mesurées. La surface foliaire a été corrélée à la longueur, la largeur, le carré de la longueur, le carré de la largeur et le produit (longueur × largeur). Les équations les plus précises, qu'elles soient linéaires ou polynomiales de second ordre, ont été testées à nouveau avec un nouvel ensemble de données, puis l'équation la plus fiable a été définie. Résultats et discussion. La première analyse a montré que les variables longueur, largeur et carré de la longueur donnaient de meilleurs résultats dans les équations polynomiales de second ordre, tandis que les équations linéaires étaient plus appropriées et précises lorsque la largeur et le produit (longueur × largeur) étaient utilisés. Lorsque ces équations ont été utilisées avec le nouvel ensemble de données, le coeffici...

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Some aspects of citrus ecophysiology in subtropical climates: re-visiting photosynthesis under natural conditions

Cited by 74 publications

References 86 publications

Effect of Gamma Irradiation Doses and Micro Elements on Some Physical, Chemical and Crop Parameters of Vigna sinensis L.

Effect of Gamma Irradiation Doses and Micro Elements on Some Physical, Chemical and Crop Parameters of Vigna sinensis L.

Performance of ‘Tuxpan Valencia’ Sweet Orange Grafted Onto 14 Rootstocks in Northern Bahia, Brazil

A simple and non-destructive model for individual leaf area estimation in citrus

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