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Growth Kinetics of Grey Oyster Mushroom (Pleurotus pulmonarius) Spawn Culture Revival from Spray Drying Application

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Spray drying represents a promising approach for preserving fungal mycelium liquid cultures, with the assurance of successful revival from powder form being a critical factor for its application. Although liquid culture of grey oyster mushroom (Pleurotus pulmonarius) has been well established, its potential for drying and subsequent revival remains underexplored, thereby limiting its use in long-term storage. In this study, the effect of various spray dryer inlet temperatures (80, 90, 100, 110, 120, 130, 140, and 150 °C) on the revival and growth kinetics of P. pulmonarius powder cultures was evaluated using maltodextrin and Arabic gum (10%) as protective agents. Growth kinetics were modelled using the Contois model, which revealed that powder prepared at 80 °C with maltodextrin exhibited the highest µmax value (6.0205), indicating superior revival and growth capacity. With Arabic gum, the highest µmax (5.7604) was observed at 90 °C. At higher inlet temperatures, revival and growth were still observed with both protectants, albeit at reduced rates. Metabolic activity, reflected by glucose consumption and citric acid production, further confirmed successful revival, with citric acid reaching the highest level of 4.958 ppm. Overall, this study demonstrates that spray-dried powder cultures of P. pulmonarius retain viability and metabolic activity, highlighting their potential for long-term preservation. ABSTRAK: Teknik pengeringan sembur merupakan satu inovasi berguna untuk kultur cecair miselium kulat, dan jaminan bahawa bentuk serbuk kultur tersebut boleh dihidupkan semula merupakan faktor penting dalam pengeringan. Walaupun kultur cecair miselium cendawan tiram kelabu telah berjaya dibangunkan, potensinya untuk dikeringkan dan seterusnya dihidupkan semula masih kurang diterokai, sekaligus menhadkan aplikasinya dalam penyimpanan jangka panjang. Kesan suhu masuk pengering sembur yang berbeza-beza (80, 90, 100, 110, 120, 130, 140 dan 150°C) terhadap kebolehan hidup semula dan kinetik pertumbuhan kultur serbuk tiram kelabu menggunakan 10% maltodekstrin dan gam Arab sebagai agen pelindung telah dikaji. Model Cointois telah digunakan dan nilai yang diperoleh daripada persamaan tersebut menunjukkan bahawa kultur serbuk yang disediakan pada 80°C dengan perlindungan maltodekstrin mempunyai nilai µmax tertinggi iaitu 6.0205 dan menunjukkan kebolehan hidup semula serta pertumbuhan yang paling baik. Dengan penggunaan gam Arab, nilai µmax tertinggi (5.7604) dicapai pada suhu 90°C. Bagi kedua-dua agen pelindung, walaupun pada suhu yang lebih tinggi, kultur serbuk masih menunjukkan kebolehan untuk hidup semula dan berkembang tetapi pada kadar yang lebih rendah. Dari aspek metabolisme, penggunaan glukosa dan penghasilan asid sitrik yang tertinggi iaitu 4.958 ppm menunjukkan bahawa kultur serbuk mempunyai aktiviti metabolik dalam tempoh hidup semula . Kajian ini membuktikan bahawa kultur serbuk P. pulmonarius mampu dibangunkan dan berpotensi untuk dipelihara dalam tempoh yang lebih lama.
Title: Growth Kinetics of Grey Oyster Mushroom (Pleurotus pulmonarius) Spawn Culture Revival from Spray Drying Application
Description:
Spray drying represents a promising approach for preserving fungal mycelium liquid cultures, with the assurance of successful revival from powder form being a critical factor for its application.
Although liquid culture of grey oyster mushroom (Pleurotus pulmonarius) has been well established, its potential for drying and subsequent revival remains underexplored, thereby limiting its use in long-term storage.
In this study, the effect of various spray dryer inlet temperatures (80, 90, 100, 110, 120, 130, 140, and 150 °C) on the revival and growth kinetics of P.
pulmonarius powder cultures was evaluated using maltodextrin and Arabic gum (10%) as protective agents.
Growth kinetics were modelled using the Contois model, which revealed that powder prepared at 80 °C with maltodextrin exhibited the highest µmax value (6.
0205), indicating superior revival and growth capacity.
With Arabic gum, the highest µmax (5.
7604) was observed at 90 °C.
At higher inlet temperatures, revival and growth were still observed with both protectants, albeit at reduced rates.
Metabolic activity, reflected by glucose consumption and citric acid production, further confirmed successful revival, with citric acid reaching the highest level of 4.
958 ppm.
Overall, this study demonstrates that spray-dried powder cultures of P.
pulmonarius retain viability and metabolic activity, highlighting their potential for long-term preservation.
ABSTRAK: Teknik pengeringan sembur merupakan satu inovasi berguna untuk kultur cecair miselium kulat, dan jaminan bahawa bentuk serbuk kultur tersebut boleh dihidupkan semula merupakan faktor penting dalam pengeringan.
Walaupun kultur cecair miselium cendawan tiram kelabu telah berjaya dibangunkan, potensinya untuk dikeringkan dan seterusnya dihidupkan semula masih kurang diterokai, sekaligus menhadkan aplikasinya dalam penyimpanan jangka panjang.
Kesan suhu masuk pengering sembur yang berbeza-beza (80, 90, 100, 110, 120, 130, 140 dan 150°C) terhadap kebolehan hidup semula dan kinetik pertumbuhan kultur serbuk tiram kelabu menggunakan 10% maltodekstrin dan gam Arab sebagai agen pelindung telah dikaji.
Model Cointois telah digunakan dan nilai yang diperoleh daripada persamaan tersebut menunjukkan bahawa kultur serbuk yang disediakan pada 80°C dengan perlindungan maltodekstrin mempunyai nilai µmax tertinggi iaitu 6.
0205 dan menunjukkan kebolehan hidup semula serta pertumbuhan yang paling baik.
Dengan penggunaan gam Arab, nilai µmax tertinggi (5.
7604) dicapai pada suhu 90°C.
Bagi kedua-dua agen pelindung, walaupun pada suhu yang lebih tinggi, kultur serbuk masih menunjukkan kebolehan untuk hidup semula dan berkembang tetapi pada kadar yang lebih rendah.
Dari aspek metabolisme, penggunaan glukosa dan penghasilan asid sitrik yang tertinggi iaitu 4.
958 ppm menunjukkan bahawa kultur serbuk mempunyai aktiviti metabolik dalam tempoh hidup semula .
Kajian ini membuktikan bahawa kultur serbuk P.
pulmonarius mampu dibangunkan dan berpotensi untuk dipelihara dalam tempoh yang lebih lama.

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