Changes in Photosynthesis and Fruit Characteristics in Olive in Response to Assimilate Availability
Tóm tắt
The “source” level in the olive cultivar Leccino was varied by girdling at different stages of fruit growth. Afterwards, the effects on gas exchange, fruit growth, and ripening and blooming were studied. Girdling during fruit growth did not significantly influence net photosynthetic rate (P
N) except in the last phase of fruit growth when the P
N was reduced. In the girdled branch, P
N began to decrease at the onset of starch accumulation because fruit growth ceased. In mid-November stomatal conductance (g
s) and transpiration rate (E) were also reduced by girdling, whereas sub-stomatal CO2 concentration (C
i) increased in leaves from the girdled branches. The total chlorophyll content (Chl) tended to decrease in parallel with the reduced P
N. Girdling did not substantially influence the leaf and shoot water contents. The large availability of assimilates seems to cause an earlier fruit ripening. In general, girdling increased fruit dry mass. Healing before the time when the majority of pulp growth occurs reduced the effect of girdling. June girdling increased the pit dry mass. Girdling at the beginning of August and September, compared to the control, increased the pulp dry mass, but the pit dry mass did not differ with respect to the control. The percentage of oil in the fruit, on a dry mass basis, increased with August and September girdlings, but the percentage of oil in the pulp did not change. Girdling reduced shoot growth, but the internode length was unchanged. Girdling slightly stimulated differentiation of flower buds.
Tài liệu tham khảo
Allan, P., George, A.P., Nissen, R.J., Rasmussen, T.S.: Effects of girdling time on growth, yield, and fruit maturity of the low chill peach cultivar Flordaprince.-Aust. J. exp. Agr. 33: 781-785, 1993.
Angelopoulos, K., Dichio, B., Xiloyannis, C.: Inhibition of photosynthesis in olive trees (Olea europaea L.) during water stress and rewatering.-J. exp. Bot. 47: 1093-1100, 1996.
Augusti, M., Andrei, I., Juan, M., Almela, V., Zacarias, L.: Effects of ringing branches on fruit size and maturity of peach and nectarine cultivars.-J. hort. Sci. Biotechnol. 73: 537-540, 1998.
Bruinsma, J.: The quantitative analysis of chlorophylls a and b in plant extracts.-Photochem. Photobiol. 2: 241-249, 1963.
Claussen, W., Biller, E.: Die Bedeutung der Saccharose-und Stärkegehalte der Blätter für die Regulierung der Netto-Photosyntheseraten.-Z. Pflanzenphysiol. 81: 189-198, 1977.
Daie, J.: Carbohydrate partitioning and metabolism in crops.-Horticult. Rev. 7: 69-108, 1985.
Foyer, C.H.: Feedback inhibition of photosynthesis through source-sink regulation in leaves.-Plant Physiol. Biochem. 26: 483-492, 1988.
Iglesias, D.J., Lliso, I., Tadeo, F.R., Talon, M.: Regulation of photosynthesis through source:sink imbalance in citrus is mediated by carbohydrate content in leaves.-Physiol. Plant. 116: 563-574, 2002.
Márquez, J.A., Benlloch, M., Rallo, L.: Seasonal changes of glucose, potassium and rubidium in "Gordal Sevillana" olive in relation to fruitfulness.-Acta Horticult. 286: 191-194, 1990.
Matos, M.C., Matos, A.A., Mantas, A., Cordeiro, V., Vieira Da Silva, J.B.: Diurnal and seasonal changes in Prunus amygdalus gas exchanges.-Photosynthetica 35: 517-524, 1998.
Morris, D.L.: Quantitative determination of carbohydrates with Dreywood's anthrone reagent.-Science 107: 254-255, 1948.
Neales, T.F., Incoll, L.D.: The control of leaf photosynthesis rate by the level of assimilate concentration in the leaf: A review of the hypothesis.-Bot. Rev. 34: 107-125, 1968.
Piller, G.J., Greaves, A.J., Meekings, J.S.: Sensitivity of floral shoot growth, fruit set and early fruit size in Actinidia deliciosa to local carbon supply.-Ann. Bot. 81: 723-728, 1998.
Proietti, P.: Effect of fruiting on leaf gas exchange in olive (Olea europaea L.).-Photosynthetica 38: 397-402, 2000.
Proietti, P., Famiani, F.: Diurnal and seasonal changes in photosynthetic characteristics in different olive (Olea europaea L.) cultivars.-Photosynthetica 40: 171-176, 2002.
Proietti, P., Palliotti, A., Nottiani, G.: Availability of assimilates and development of olive fruit.-Acta Horticult. 474: 297-300, 1999.
Proietti, P., Tombesi, A.: Effect of girdling on photosynthetic activity in olive leaves.-Acta Horticult. 286: 215-218, 1990.
Proietti, P., Tombesi, A.: Translocation of assimilates and source-sink influences on productive characteristics of the olive tree.-Adv. hort. Sci. 10: 11-14, 1996.
Proietti, P., Tombesi, A., Boco, M.: Influence of leaf shading and defoliation on oil synthesis and growth of olive fruit.-Acta Horticult. 356: 272-277, 1994.
Rallo, L., Suarez, M.P.: Seasonal distribution of dry matter within the olive fruit-bearing limb.-Adv. hort. Sci. 3: 55-59, 1989.
Sarmiento, R., Val Puesta, V., Catalina, I., Gonzalez Garcia, F.: [Variation in contents of starch and soluble carbohydrates in leaves and buds in trees of Olea europea var. Manzanillo in relation to vegetative and productive processes.]-Anal. Edafol. Agrobiol. 35: 687-695, 1976. [In Span.]
Wang, Z., Yin, Y., He, M., Cao, H.: Source-sink manipulation effects on postanthesis photosynthesis and grain setting on spike in winter wheat.-Photosynthetica 35: 453-459, 1998.
Wilton, J.: Girdling studies.-Orchardist 73: 14-17, 2000.
Zhou, R., Quebedeaux, B.: Changes in photosynthesis and carbohydrate metabolism in mature apple leaves in response to whole plant source-sink manipulation.-J. amer. Soc. hortic. Sci. 128: 113-119, 2003.