Modeling the canopy photosynthetic rate of romaine lettuce (Lactuca sativa L.) grown in a plant factory at varying CO2 concentrations and growth stages

Jung, Do Hyun; Kim, Damin; Yoon, Hyo In; Moon, Tae Won; Park, Kyoung Sub; Son, Jung Eek

doi:10.1007/s13580-016-0103-z

Cited by 21 publications

(18 citation statements)

References 17 publications

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“…Walaupun pertumbuhan tanaman dikendalikan oleh banyak proses fisiologis, biokimia, dan molekuler, namun fotosintesis merupakan kunci yang memberikan kontribusi besar terhadap pertumbuhan dan perkembangan tanaman (Hu et al 2011;Jajoo 2014;;Jung et al 2016, Apichatmeta et al 2017, Lahive et al 2017. Menurut Jaafar dan Ibrahim (2012), fotosintesis merupakan proses metabolisme di mana tanaman melalui klorofil mensintesis senyawa organik dari bahan baku organik dengan adanya sinar matahari.…”

Section: A Laju Fotosintesisunclassified

Pengaruh Ketinggian Tempat terhadap Performa Fisiologis Tanaman Kelapa Sawit (Elaeis Guineensis Jacq.)

Listia¹,

Pradiko²,

Syarovy³

et al. 2020

J. Tanah dan Iklim

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Saat ini, tercatat lebih dari 10.000 hektar tanaman kelapa sawit di Indonesia telah dikembangkan pada lahan dengan ketinggian tempat lebih dari 600 m di atas permukaan laut (dpl). Budidaya kelapa sawit di dataran tinggi dihadapkan pada beberapa faktor pembatas seperti rendahnya suhu, tingginya kelembaban dan curah hujan, serta terbatasnya lama penyinaran matahari. Penelitian ini bertujuan untuk mengetahui karakteristik fisiologis tanaman kelapa sawit yang dibudidayakan di empat lokasi dengan ketinggian tempat yang berbeda yaitu: 50, 368, 693, dan >865 m dpl. Penelitian dilakukan pada tanaman kelapa sawit berumur 7-8 tahun. Peubah yang diamati adalah peubah lingkungan/iklim serta performa fisiologis tanaman. Hasil penelitian menunjukkan bahwa karakteristik fisiologis tanaman seperti laju fotosintesis, laju transpirasi, konsentrasi CO2 interseluler, dan dimensi stomata dari tanaman kelapa sawit yang dibudidayakan pada dataran tinggi lebih rendah dibanding proses fisiologis tanaman kelapa sawit yang dibudidayakan pada dataran yang lebih rendah. Akan tetapi tingkat prolin dan aktivitas enzim nitrate reductase yang lebih tinggi dimiliki oleh tanaman yang berada pada dataran tinggi. Penelitian ini menegaskan bahwa karakteristik fisiologi tanaman kelapa sawit yang optimum terdapat pada tanaman yang berada pada dataran dengan ketinggian kurang dari 600 m dpl.

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Section: A Laju Fotosintesisunclassified

Pengaruh Ketinggian Tempat terhadap Performa Fisiologis Tanaman Kelapa Sawit (Elaeis Guineensis Jacq.)

Listia¹,

Pradiko²,

Syarovy³

et al. 2020

J. Tanah dan Iklim

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“…Therefore, the development of evaluation techniques that are non-destructive, easily applied in the field are needed to effectively assess plant responses to stress and environmental conditions. Modelling can be one of the efficient approaches for estimation (Jung et al, 2016;Moon et al, 2018). Sap flow measurement was proposed for the evaluation of transpiration rates in plants, and can be measured by the heat balance of the moving sap stream (Smith and Allen, 1996).…”

Section: Introductionmentioning

confidence: 99%

Nondestructive Measurement of Paprika (Capsicum annuum L.) Internal Electrical Conductivity and Its Relation to Environmental Factors

Park,

Park

et al. 2018

HST

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The electrical properties of plants represent physiological activities including water and ion transport in their stems. Therefore, monitoring electrical conductivity in plants (EC p) can be used to detect plant responses to changes in environmental conditions. Stable measurement of internal EC p was developed to evaluate the relationship between the EC p and environmental factors. Two electrodes with three needles were inserted into each side of paprika stems to monitor paprika EC p in response to the environmental factors of temperature, irradiation, and relative humidity. The EC p was positively correlated with irradiation and temperature (R 2 = 0.642 and 0.815, respectively), but negatively correlated with relative humidity (R 2 =-0.416). The EC p was higher in May than in February due to size differences in the vascular bundle sheaths as well as changes in irradiation and temperature. The EC p was predicted using a regression equation that described environmental data, and the predicted results corresponded well to plant measurements. The EC p was higher during the day than at night, which was attributed to higher daytime water content in the stems.

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“…In crop growth models, the instantaneous rate of change in terms of photosynthesis, respiration, elongation, and development of leaves is calculated according to changes in the environment to represent the overall system change numerically. Correction by calibration and validation is important for improving the accuracy of model prediction [20,25,[38][39][40]. The rate of photosynthesis of crops can be calculated from the assimilation rate of CO 2 , which can be accurately measured.…”

Section: Prediction Of Photosynthetic Rate Of Kimchi Cabbagementioning

confidence: 99%

“…This model can express the change in the photosynthetic rate based on light intensity and CO 2 concentration; however, it cannot express differences associated with the growth stage. Light use efficiency decreases exponentially with an increase in the leaf area index as plants grow [24]; therefore, it is necessary to modify the model according to the growth stage [25].…”

Section: Introductionmentioning

confidence: 99%

Evaluating Growth and Photosynthesis of Kimchi Cabbage According to Extreme Weather Conditions

Wi¹,

Lee²,

An³

et al. 2020

Agronomy

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The aim of this study was to develop and validate growth and photosynthetic models of Kimchi cabbages under extreme temperature conditions at different growth stages. Kimchi cabbage plants were subjected to low and high air temperatures 7–10 days after transplanting (DAT) and 40–43 DAT using extreme weather simulators. Except during these periods, the air temperature, relative humidity, solar radiation, and precipitation were set according to previous meteorological data. The experiments were performed over two years: in the first year, data were used to develop the models; the second-year experimental data were used for validation. The growth parameters and relative growth rate of Kimchi cabbage decreased due to low and high air temperature treatments. Photosynthetic CO2 response curves, which were measured using a portable gas exchange system, were used to calculate three biochemical parameters from measured data: photochemical efficiency, carboxylation conductance, and dark respiration. These parameters were used to develop the photosynthetic models (modified Thornley’s models) representing predictions of net photosynthetic rate by CO2 concentration and growth stage. The simulated photosynthetic rate with extreme high temperature treatment (35/31 °C) was 19.7 μmol m−2 s−1 which was evaluated approximately 3% deduction compared with control. Results of this study indicate that the growth and photosynthetic models developed here could be applied to evaluate retarded growth and net photosynthetic rate under extreme temperature conditions.

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Modeling the canopy photosynthetic rate of romaine lettuce (Lactuca sativa L.) grown in a plant factory at varying CO2 concentrations and growth stages

Cited by 21 publications

References 17 publications

Pengaruh Ketinggian Tempat terhadap Performa Fisiologis Tanaman Kelapa Sawit (Elaeis Guineensis Jacq.)

Pengaruh Ketinggian Tempat terhadap Performa Fisiologis Tanaman Kelapa Sawit (Elaeis Guineensis Jacq.)

Nondestructive Measurement of Paprika (Capsicum annuum L.) Internal Electrical Conductivity and Its Relation to Environmental Factors

Evaluating Growth and Photosynthesis of Kimchi Cabbage According to Extreme Weather Conditions

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