J. Bio. Env. Sci.10(3), 241-248, March 2017
The stomatal conductance (gs), photosynthesis rate (Pn), intercellular CO2 conc. (Ci), chlorophyll and morphogeneic data was collected from the 12 month old citrus rootstocks (Rough lemon, Gada dehi, Flying dragon, Brazilian sour orange, Citron citrange, Carrizo citrange, Rubidoux trifoliate, Savage citrange, Yuma citrange and Citromelo-1452) grown in peat moss under 100, 70, 40 and 10 %,s available water capacities in glass house. Pn, gs, and E rates were decreased down with increase in water stress level. Rough lemon, Gada dehi and Savage citrange mesophyll Ci was not that much altered with change in water conc. However, Carrizo citrange, Citron citrange, Citromelo-1452 and Brazilian sour orange mesophyll carbon remained higher than that of Chlorophyll, Pn and gs ratios. Ci intake enhanced on 15 days and reached maximum in 45 days especially on 10% FC. The osmoprotactant cholorophyll conc. was opted as a drought resistant strategy (DRS) especially by trifoliate. Moreover, plant biomass of Keen sour orange, Rough lemon and Gada dehi was high comparatively even under stress.
Anonymous. 2007. Agricultural Statistics of Pakistan. MINFAL, Islamabad.
Binzel ML, Reuveni M. 1994. Cellular Mechanism of salt tolerance in plants. Horticultural Review 38, 33-69.
Flexas J, Medrano H. 2002. Drought inhibition of photosynthesis in C3 plants: stomatal and non-stomatal limitations revisited. Annals of Botany 89, 183-189.
Flexas J, Ribas-Carbo M, Diaz-Espejo A, Galmes J, Medrano H. 2008. Mesophyll conductance to CO2: current knowledge and future prospects. Plant, Cell and Environment 31, 602-621.
Flexas J, Barbour MM, Cabrera HM. 2004. Mesophyll diffusion conductance to CO2: an unappreciated central player in photosynthesis. Plant Science, in Press.
Garcia-Sanchez F, Perez-Perez JG, Botia P, Martinez V. 2006. The response of young mandarin trees grown under saline conditions depends on the rootstock. European Journal of Agronomy 24, 129-139.
Khan AA, Rao SA, McNeilly T. 2003. Assessment of salinity tolerance based upon seedling root growth response functions in maize (Zea mays L.). Euphytica 131, 81-89.
Lima M, Furlani PR, Miranda JB. 1992. Divergent selection for aluminium tolerance in maize (Zea mays L,) population. Maydica 37, 123-132.
Lisar SYS, Motafakkerazad R, Hossain MM, Rahman IMM. 2012. Water Stress in Plants: Causes, Effects and Responses, in Water Stress; Prof. Ismail Md. Mofizur Rahman, (ed.), in Tech: New York, USA.
Medina C L,Machado EC, Pinto JM. 1998. Fotossíntese de laranjeira Valência enxertada sobre quatro porta-enxertose submetidas a deﬁciência hídrica. Bragantia 57, 1-14.
Pérez-Pérez JG, García J, Robles JM and Botía P. 2010. Economic analysis of navel orange V.‘ Lane Late’ grown on two different drought-tolerant rootstock under deﬁcit irrigation in south-eastern Spain. Agricultural Water Management 97, 157-164.
Pérez-Pérez JG, Romero PJM, Navarro, Botía P. 2008. Response of sweet range cv ‘Lane late’ to deﬁcit irrigation in two rootstocks. I: water relations, leaf gas exchange and vegetative growth. Irrigation Science 26, 415-425.
Romero P, Navarro JM, Perez-Perez J, Garcia-Sanchez F, Gomez-Gomez G, Porras I, Martinez V, Botia P. 2006. Deﬁcit irrigation and rootstock: their effects on water relations, vegetative development, yield, fruit quality and mineral nutrition of Clemenules mandarin. Tree Physiology 26, 1537-1548.
Shah MA. 2004. Citrus Cultivation in N.W.F.P. Proceedings of the 1st International conference on citri culture, University of Agriculture Faisalabad p. 36-39.
Syvertsen JP, Levy L. 2005. Salinity interactions with other abiotic and biotic stresses in citrus. Horticultural Technology 15, 100-103.
Szabados L, Savourea A. 2009. Proline: A Multifunctional Amino Acid. Trends in Plant Science 15, 89-97.
Zhao TJ, Sun S,Liu Y, Liu JM, Liu Q, Yan YBN, Zhou HM. 2006. Regulating the drought-responsive element (DRE) mediate signaling pathway by synergic functions transactive and trans inactive DRE binding factors in Brassica napus, Journal of Biological and. Chemical 281, 10752-107.