Increased sink strength offsets the inhibitory effect of sucrose on sugarcane photosynthesis

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• 作者：Rafael V. Ribeiro^a ; ^{rvr@unicamp.br} ; ^{rvribe@gmail.com} ; Eduardo C. Machado^b ; ^{caruso@iac.sp.gov.br} ; José ; R. Magalhã ; es Filho^b ; ^{zeroagro@yahoo.com.br} ; Ana Karla M. Lobo^c ; ^{karlamlobo@gmail.com} ; Má ; rcio O. Martins^c ; ^{momartins@yahoo.com.br} ; Joaquim A.G. Silveira^c ; ^{silveira@ufc.br} ; Xinyou Yin^d ; ^{xinyou.yin@wur.nl} ; Paul C. Struik^d ; ^{paul.struik@wur.nl}
• 关键词：A ; leaf CO2 assimilation in a given condition ; A380 ; leaf CO2 assimilation under 380  ; μmol CO2  ; mol&minus ; 1 in the air and a level of photosynthetically active irradiance of 2000  ; μmol  ; m&minus ; 2  ; s&minus ; 1 ; Dark ; partial darkness treatment ; D+S ; treatment combining partial darkness and spraying a sucrose solution ; gs ; stomatal conductance ; Jatp ; rate of ATP production driven by electron transport ; k ; the initial slope of the A-Ci curve ; NI ; neutral invertase ; NSL ; non-stomat
• 刊名：Journal of Plant Physiology
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：208
• 期：Complete
• 页码：61-69
• 全文大小：1266 K
• 卷排序：208

文摘

Source-sink relationship was perturbed in two sugarcane cultivars. Exogenous sucrose reduces photosynthesis through biochemical and stomatal limitations. Both Rubisco and PEPC activities were down-regulated by sucrose spraying. Increased sink demand nulled the inhibitory effect of sucrose on sugarcane photosynthesis.