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Li, Yuanhuan and Azman, Elisa Azura and Ismail, Roslan and Deng, Xiaohua and Dhar, Shiva and Noviardi, Rhazista and Citraresmini, Ania and Zi, Tao and Yang, Lili and Aalruz, Hasan and Ababneh, Hazim S. and Abaraogu, Ukachukwu O. and Abbas, Nasir and Abd ElHafeez, Samar and Abdel-Hameed, Reda and Abdel-Rahman, Wael M. and Abdelwahab, Siddig Ibrahim and Abdi, Sepideh and Abdollahi, Arash and Abdoun, Meriem and Abdulah, Deldar Morad and Abdullah and Abdullahi, Auwal and Abdul-Rahman, Toufik and Abdykerimova, Kulmira and Abebe, Mesfin and Abedi, Armita and Abedini, Mehrandokht and Abegaz, Kedir Hussein and Abie, Alemwork and Abie, Dagninet Derebe and Abiodun, Olumide and Aboagye, Richard Gyan and Abolhassani, Hassan and Abonie, Ulric Sena and Abrar, Mohammed Mehdi and Abu, Zhanar and Abu Farha, Rana Kamal and Abuadas, Fuad Hamdi A. and Abubakar, Aminu Kende and Abubakar, Bilyaminu and Abu-Gharbieh, Eman and Abukhadijah, Hana J. and Abusalah, Mai Abdel Haleem and Abushanab, Dina and Acharya, Swetha and Acuna, Juan Manuel and Adams, Lisa C. and Addo, Isaac Yeboah and Adebiyi, Babatope Oluwadamilare and Adedia, David and Adedokun, Kamoru Ademola
(2026)
Effect of root promoter on tobacco (Nicotiana tabacum L.) growth and nutrient accumulation at Hunan Province, China.
Scientific Reports, 16 (1).
art. no. 8675.
pp. 1-13.
ISSN 2045-2322
Abstract
Early root establishment is vital for tobacco survival under low-temperature stress in southern China. This field study evaluated potassium humate (PH), Hymexazol and Isorothiolane emulsifiable concentrate (HIEC), and chitosan (CS). Compared to the control group (CG), PH and HIEC emerged as the most effective treatments. Agronomic traits (e.g., root length, leaf number) increased by 5.41% to 24.31% and 15.00% to 80.91% relative to the CG, respectively, while dry matter and nutrient accumulation (nitrogen, phosphorus, potassium) significantly enhanced by 10.84% to 64.83% and 28.03% to 100%, respectively. Mechanistically, PH employed a “Soil-Optimization Strategy,” improving soil pH and organic matter while maintaining microbial diversity. Conversely, HIEC utilized a ‘Functional Selection Strategy,’ stimulating growth by selectively enriching protective genera such as Gaiella and Sphingomonas (reaching relative abundances of 11.36% and 3.60%, respectively, compared to the CG), despite reducing overall bacterial diversity. Furthermore, correlation analysis revealed a positive feedback loop where root expansion enhanced Nitrogen/Potassium uptake, boosting relative chlorophyll content (SPAD) and fueling biomass accumulation. These findings highlight that distinct ecological pathways, specifically soil amelioration and functional microbiome selection, effectively drive crop resilience, providing practical cultivation measures for the tobacco industry to overcome adverse climatic conditions.
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