Investigation into the photosynthetic activity of different inbred lines and hybrids of sugar beet under water stress

• Published in: Arhiv za poljoprivredne nauke Vol. 48
• Main Authors: Stankovic Z.S, Petrovic M
• Format: Journal Article
• Language: English
• Published: 1987
• Subjects: adenosine triphosphate; adenosintrifosfato; beta vulgaris; biosintesis; biosynthese; biosynthesis; carbon dioxide; chloroplaste; chloroplasts; cloroplasto; dioxido de carbono; dioxyde de carbone; drought resistance; drought stress; estres de sequia; evaluacion; evaluation; f1 hybrids; feuille; fosforilacion; fotosintesis; hibrido f1; hibridos; hojas; hybride; hybride f1; hybrids; inbred lines; leaves; lignee consanguine; lineas consanguineas; phosphorylation; photosynthese; photosynthesis; potentiel hydrique; resistance a la secheresse; resistencia a la sequia; stress du a la secheresse; tension de absorcion; transpiracion; transpiration; water potential; yougoslavie; yugoslavia; zea mays
• ISSN: 0004-1262

Results of investigations into the effect of water stress upon photosynthetic activity of isolated chloroplasts and intact leaves in individual parent components and F1 hybrids of sugar beet are presented. The results obtained showed that the rates of ATP synthesis in noncyclic and cyclic photophosphorylation were approximately 3.5 times lower as compared to the control plants. Water stress had a similar effect upon fixation of "CO2, i.e. intensity of photosynthesis. The effect of water stress upon photosynthetic activity also depended on the lines and hybrids investigated. The highest inhibition was obtained in the lines 4n MM-206 and in 4n MM-214 and their hybrids, whereas the lowest in the line 4n MM-213 and the hybrid Ns-Hy 194. On the basis of the results obtained it can be concluded that a certain correlation occurs between the photosynthetic activity and other physiological parameters (water potential, RWC, water loss rate, etc.) used as criteria for evaluating plant drought resistance.