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Ali, A. (2018). Key Regulators of Sucrose Accumulation during Different Developmental Phases of Sugar Beet Plants. Egyptian Journal of Botany, 58(3), 331-341. doi: 10.21608/ejbo.2018.2871.1148
Awatif S. Ali. "Key Regulators of Sucrose Accumulation during Different Developmental Phases of Sugar Beet Plants". Egyptian Journal of Botany, 58, 3, 2018, 331-341. doi: 10.21608/ejbo.2018.2871.1148
Ali, A. (2018). 'Key Regulators of Sucrose Accumulation during Different Developmental Phases of Sugar Beet Plants', Egyptian Journal of Botany, 58(3), pp. 331-341. doi: 10.21608/ejbo.2018.2871.1148
Ali, A. Key Regulators of Sucrose Accumulation during Different Developmental Phases of Sugar Beet Plants. Egyptian Journal of Botany, 2018; 58(3): 331-341. doi: 10.21608/ejbo.2018.2871.1148

Key Regulators of Sucrose Accumulation during Different Developmental Phases of Sugar Beet Plants

Article 3, Volume 58, Issue 3, December 2018, Page 331-341  XML PDF (632.18 K)
Document Type: Regular issue (Original Article)
DOI: 10.21608/ejbo.2018.2871.1148
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Author
Awatif S. Ali email
Botany Department, Faculty of Science, Kafrelsheikh University, Kafr El-Sheikh, Egypt
Abstract
BECAUSE of the economic importance of sugar beet (Beta vulgaris L) in sucrose production, a field experiment was conducted to elucidate the key regulators of sucrose metabolism in source leaves and sink roots at 135, 150, 165 and 180 day after sowing (DAS) that would be determined sucrose yield. Increase in sucrose phosphate synthase (SPS) activity in source and sink tissues during the first three selected harvest phases was associated in leaves with an increase in activities of acid invertase (AI) and neutral invertase (NI), chlorophyll a, total chlorophyll and reducing sugars on the one hand and the levels of sucrose and inorganic phosphorus (Pi) in roots on the other hand. The maximum sucrose level in roots was at 165 DAS. A gradual increase in root NI activity accompanied by an increase in reducing sugars and a decrease in the sucrose/reducing sugars ratio in roots by harvest date progress was observed. Pearson correlation test revealed contradictory findings whereas, SPS activity correlated with sucrose level in leaves negatively but positively in roots. All investigated enzymes in leaves correlated negatively with sucrose/reducing ratio. But in roots, only NI activity correlated negatively with sucrose/reducing sugars ratio.
Keywords
AI activity; Chl b/Chl a ratio; Pi level; SPS activity; Sucrose/reducing sugars ratio
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