Acclimation Potential to High Irradiance of Two Cultivars of Watermelon

In broccoli heads grown in spring and in autumn, and harvested at four various developmental stages antioxidant ability as well as certain indices of plant senescence were investigated. Development of broccoli heads was accompanied by losses of chlorophyll and ascorbic acid. At pre-florescence stage accumulation of soluble phenolics was observed. Activity of peroxidase in the initial stage of growth increased significantly and its high level was mantained during the whole growing period. The profound evolution of ethylene was manifested by plants of the pre-florescence stage.In broccoli grown in spring the higher contents of chlorophyll and phenolics in comparison with the autumn experiment were observed, as well as slightly higher activities of peroxidase and catalase. Total antioxidant activity was considerably higher in spring than in autumn.

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Some antioxidant and senescence parameters of broccoli as related to its developmental stages

Leja

Mareczek

Starzyńska

2002

Acta Physiol Plant

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Changes in Chlorophyll a Fluorescence, Lipid Peroxidation, and Detoxificant System in Potato Plants Grown under Filtered and Non-Filtered Air in Open-Top Chambers

Calatayud¹,

Alvarado²,

Barreno³

2001

Photosynt.

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Growth, assimilate partition and yield of melon charenthais under different shading screens

Pereira¹,

Puiatti²,

Finger³

et al. 2011

Hortic. Bras.

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In this experiment we evaluated the growth, partition of assimilates and yield of melons type hybrid Charenthais 'Fleuron' under different shading nets. The experiment was conducted at Federal University of Viçosa, from November 24, 2003 to March 11, 2004. The treatments consisted of four growth environmental conditions, as follows: control (full sun), and under Aluminet® 30%-O, Cromatinet® 30%-O, Sombrite® 30%, with reduction of photosynthetic active radiation (PAR) of 30.85%, 35.9% and 32.0%, respectively. The experiment was arranged in a complete random design with four replicates. For the periodically evaluated characteristics we used a sub divided parcel 4 x 7 with the growing conditions in the parcel and the evaluations on the sub parcel (0, 14, 28, 42, 56, 70 and 84 days after transplantation). Among the shading nets, overall growth was superior under Aluminet® 30%-O, with similar plant height, length and number of internodes, number of leaves per plant, leaf dry weight, total and commercial yield of fruits and greater leaf area per plant compared to control at full sun. The low number of daily radiation (4.47 hours) and the good growth and yield of the melon when shaded by 30.85% with Aluminet® 30%-O, are indicatives that this culture does not require elevated levels of radiation as mentioned before. The growth of melon under partial restriction of light is promising, opening opportunities to production in new environments as agroforestry systems and associated cultivations.

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Acclimation Potential to High Irradiance of Two Cultivars of Watermelon

Cited by 4 publications

References 16 publications

Some antioxidant and senescence parameters of broccoli as related to its developmental stages

Some antioxidant and senescence parameters of broccoli as related to its developmental stages

Changes in Chlorophyll a Fluorescence, Lipid Peroxidation, and Detoxificant System in Potato Plants Grown under Filtered and Non-Filtered Air in Open-Top Chambers

Growth, assimilate partition and yield of melon charenthais under different shading screens

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