@article{MAKHILLJAVA201211213824,
    title = {Photosynthetic Properties of Different Drought Resistant Chicory Strains and their Responses to Drought Stress},
    journal = {Journal of Animal and Veterinary Advances},
    volume = {11},
    number = {21},
    pages = {3898-3907},
    year = {2012},
    issn = {1680-5593},
    doi = {javaa.2012.3898.3907},
    url = {https://makhillpublications.co/view-article.php?issn=1680-5593&doi=javaa.2012.3898.3907},
    author = {Xinshi,Yongfen,Juan,Xiangyong,Junjiang,Fei and},
    keywords = {Cichorium intybus L.,drought stress,photosynthesis,chlorophyll fluorescence,resistance,China},
    abstract = {The photosynthetic properties and photosynthetic responses to drought stress in the pot experiment of three chicory (<I>Cichorium intybus</I> L.) strains with different drought resistance, space-mutagenesis-bred strains PA-82 and PA-43 and their initial strain PA-57 were studied using Li-6400 portable photosynthesis system. The results showed that diurnal time courses of net Photosynthetic rate (Pn), Transpiration rate (Tr), stomatal Conductance (Cond) presented as double-peak curves. There was an obvious midday Pn depression, which was caused by nonstomatal factors. Highest Pn, Tr and Cond values were observed in PA-82 and lowest corresponding values in PA-43 (p&lt;0.05). Intercellular CO<SUB>2</SUB> Concentration (Ci) of three strains showed an opposite course to that of Pn which reached its valley at 10:00-12:00. PA-82 had the highest Water Use Efficiency (WUE), followed by PA-57, then PA-43. Light Saturation Points (LSP) of three strains were between 1207-1264 &#956;mol<SUP>.</SUP>/m<SUP>2</SUP>/sec and Light Compensation Points (LCP) were between 14.55-14.85 &#956;mol/<SUP>.</SUP>m<SUP>2</SUP>/sec, both indicating good adaptation to changes of light intensity. Pn, Tr, Cond, maximal photochemical efficiency of PS II in dark adaptation (Fv/Fm), potential photochemical efficiency (Fv/F0) and coefficient of Photochemical quenching (qP) decreased with the aggravation of water deficit. Among the three strains, the parameters of PA-43 dropped to a greater extent at a highest speed, followed by PA-57 then PA-82. With the aggravation of water deficit, Ci and co-efficient of nonphotochemical quenching (qN) increased to a greater extent at a highest speed in PA-43. The results suggest that PA-82 and PA-57 have higher resistance against severe water deficit in comparison with PA-43.}
    }