Response of Photosynthetic Parameters of Sweet Pepper Leaves to Light Quality Manipulation by Photoselective Shade Nets

Kong, Yun; Avraham, Lior; Ratner, Kira; Shahak, Yosepha

doi:10.17660/actahortic.2012.956.59

Cited by 18 publications

(7 citation statements)

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“…However, the balance between the red and blue is more important than the concentration of these bands in the spectrum resulting from such colored nets [21]. Similar results were observed for Capsicum annuum grown under white, yellow and red light, where despite of blocking 35% of the radiation, the higher photosynthetic rate was observed under white light [21].…”

Section: Resultssupporting

confidence: 67%

Gas Exchange and Production of Photosynthetic Pigments of <i>Piper aduncum</i> L. Grown at Different Irradiances

Pacheco¹,

Silveira²,

Alvarenga³

et al. 2013

AJPS

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The species Piper aduncum is a plant with great economic potential, because the essential oil has antimicrobial activity and insecticides. Thus, as the light directly affects photosynthesis process, the present study evaluated the gas exchanges' variables and photosynthetic pigments' production of P. aduncum grown under different irradiances. Treatments consisted in environments with 100%, 70% and 50% of irradiance and environments with colored nets (red and blue). After 150 days of culture, photosynthetic activity (A), stomatal conductance (gs) transpiration rate (E), internal CO 2 concentration (Ci), deficit vapor pressure (DVP), leaf temperature, concentration of internal/external CO 2 (Ci/Ca), carboxylation efficiency (A/Ci) and efficiency water use (A/E) were evaluated. Pigments chlorophyll a, b, carotenoids, total and chlorophyll a/b ratio were also measured. From the observed data, it can be concluded that the species Piper aduncun developed various mechanisms for adaptation to different irradiance conditions. Moreover, it can be inferred that their photosynthetic process is more efficient and has larger spectral intensities of light, with higher efficiency photosynthetic when grown under 70% and 100% of radiation.

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Section: Resultssupporting

confidence: 67%

Gas Exchange and Production of Photosynthetic Pigments of <i>Piper aduncum</i> L. Grown at Different Irradiances

Pacheco¹,

Silveira²,

Alvarenga³

et al. 2013

AJPS

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show abstract

“…2A) and PAR (Fig. 2E) (Bastías, 2011;Kong et al 2012), that may have modified leaf anatomy, enlarging the stomata (Kong et al 2012) and consequently improving the photosynthetic performance. Fruit growth parameters measured with fruit gauges did not allow to detect such information, probably due to the low number of replicates which was not enough and/or the selected apples were not representative of the LE.…”

Section: Extension Shoot Measurementmentioning

confidence: 99%

“…were found, thus potentially explaining the lower tree development. Lower blue light transmission has been proved to affect the development of foliar anatomy (Kong et al 2012), reducing the mesophyll layer (Pushnik et al 1987;Saebo et al 1995). The green light reversal effect and inactivating properties of green-yellow photoreceptors may have further intensified the lower performance of trees under the Y net compared to other treatments.…”

Section: Extension Shoot Measurementmentioning

confidence: 99%

Early apple fruit development under photoselective nets

Boini

Casadio

Bresilla

et al. 2022

Scientia Horticulturae

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“…The skin of the fruit under the red and black net was significantly darker than under pearl net. Photo-selective netting can affect the yield and quality of pepper fruits, because it changes radiation spectra and microclimatic conditions (Shahak 2008;Kong et al, 2012). The spectral composition of light can influence the intensity of photosynthesis, and thus, the biomass production because similar photon flux densities of different wavelengths result in different rates of leaf photosynthesis (van Leperen 2012).…”

Section: Net Shading Technologymentioning

confidence: 99%

Effect of Net Shading Technology and Harvest Times on Yield and Fruit Quality of Sweet Pepper

et al. 2016

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Abstract. Shading effects on yield and fruit quality (sunscald, total carotenoid content and ratio of red and yellow pigments) were examined in 'Karpex' red colored sweet pepper hybrid (Capsicum annuum L.). The sampling was performed at two different harvest times; 27 th of August and 1 st of October in 2013. The photo-selective shading nets were CN red from Israel, and yellow, red, green, and white from Hungary, all with 40% shade factor. We found a significantly higher yield under the yellow and red net compared with the unshaded control. The yield was more than 50% higher under the yellow net (33.6 t ha -1 ), than in the control plot (15.5 t ha -1 ; F 5,12 =10.761, p<0.001). All shading nets had a significantly positive effect against sunburn at the first harvest (F 5,12 =12.403, p<0.001), except for the white shading net. In addition, no sunscald fruit were observed under CN red net and green net, compared to 4 t ha -1 losses due to sunburn in the control plot. No sunscald pepper fruit were detected at the second harvest. The total carotenoid content ranged between 163.4 and 338.9 μg g -1 fw. Regarding the net shading, we could determine significant difference in total carotenoid content, between white net and the control treatment (F 5,12 =4.372, p=0.017) at the second harvest. The unshaded control contained more than 50% less carotenoid than that under the white net. Peppers under the yellow and red nets contained the lowest amount of carotenoids. Overall, significantly more carotenoids were detected at the second harvest, than at the first harvest (F 1,24 =220.035, p<0.001). In contrast, the ratio of red and yellow pigments was higher at the first harvest. Hence, the earlier harvest is recommended in order to produce pepper fruits with attractive red color. In conclusion, the use of net shading technology resulted in increased yield, reduced sunscald, and can be tailored to improve fruit color.

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Response of Photosynthetic Parameters of Sweet Pepper Leaves to Light Quality Manipulation by Photoselective Shade Nets

Cited by 18 publications

References 0 publications

Gas Exchange and Production of Photosynthetic Pigments of <i>Piper aduncum</i> L. Grown at Different Irradiances

Gas Exchange and Production of Photosynthetic Pigments of <i>Piper aduncum</i> L. Grown at Different Irradiances

Early apple fruit development under photoselective nets

Effect of Net Shading Technology and Harvest Times on Yield and Fruit Quality of Sweet Pepper

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Response of Photosynthetic Parameters of Sweet Pepper Leaves to Light Quality Manipulation by Photoselective Shade Nets

Cited by 18 publications

References 0 publications

Gas Exchange and Production of Photosynthetic Pigments of &lt;i&gt;Piper aduncum&lt;/i&gt; L. Grown at Different Irradiances

Gas Exchange and Production of Photosynthetic Pigments of &lt;i&gt;Piper aduncum&lt;/i&gt; L. Grown at Different Irradiances

Early apple fruit development under photoselective nets

Effect of Net Shading Technology and Harvest Times on Yield and Fruit Quality of Sweet Pepper

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Product

Resources

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Gas Exchange and Production of Photosynthetic Pigments of <i>Piper aduncum</i> L. Grown at Different Irradiances

Gas Exchange and Production of Photosynthetic Pigments of <i>Piper aduncum</i> L. Grown at Different Irradiances