Asian Journal of Plant Sciences1682-39741812-5697Asian Network for Scientific Information10.3923/ajps.2009.102.110ArunyanarkA. JogloyS. VorasootN. AkkasaengC. KesmalaT. PatanothaiA. 2200982The objectives of this study were to examine the stability
of SPAD (soil plant analysis development) chlorophyll meter reading (SCMR)
and chlorophyll density, surrogate trait of drought tolerance in peanut
(Arachis hypogaea L.) and their relationships in different
leaf positions at different times under different drought stress conditions.
Chlorophyll density and SCMR varied depending on water regimes, times
of sampling and genotypes, but water regime x genotype interactions were
not significant for chlorophyll density and SCMR. The correlation coefficients
between chlorophyll density and SCMR were positive and significant across
irrigation treatments (r = 0.76**, 0.94** and 0.96**) and each water regime,
plant age and leaf position (r = 0.31 to 0.99**). Interestingly, chlorophyll
density and SCMR at different water regimes were also correlated significantly,
indicating the stability of their relationship in different water regime
conditions. The result suggest that evaluation of chlorophyll density
by SCMR can be carried out at any water regime conditions in the second
or third-fully expanded leaves after 40 days of crop growth. This confers
a large flexibility to application of SCMR in breeding program for drought
tolerance.]]>Arnon, D.I.,1949Beta vulgaris.]]>24115Arunyanark, A., S. Jogloy, C. Akkasaeng, N. Vorasoot and T. Kesmala et al.,2008194113125Bindi, M., A. Hacour, K. Vandermeiren, J. Craigon, K. Ojanpera, G. Sellden, P. Hogy, J. Finnan and L. Fibbi,200217319335Bowyer, J.R. and R.C. Leegood,19971997pp: 49-110pp: 49-110Fotovat, R., M. Valizadeh and M. Toorchi,2007Triticum aestivum L.) under well-watered and drought stress conditions.]]>5225227Gomez, K.A. and A.A. Gomez,19842nd Edn.,Pages: 704Pages: 704Hoel, B.O. and K.A. Solhang,199882389392Markwell, J., J.C. Osterman and J.L. Mitchell,199546467472Moran, R.,19826913761381Nageswara Rao, R.C. and G.C. Wright,19943498103Nageswara Rao, R.C., M. Udayakumar, G.D. Farquhar, H.S. Talwar and T.G. Prasad,199522545551Nageswara Rao, R.C., H.S. Talwar and G.C. Wright,2001Arachis hypogaea L.) using a chlorophyll meter.]]>189175182Nautiyal, P.C., R.C. Nageswara Rao and Y.C. Joshi,2002746779Ommen, O.E., A. Donnelly, S. Vanhoutvin, M. van Oijen and R. Manderscheid,19992 concentrations and other environmental stresses within the ESPACE-wheat project.]]>10197203Richards, R.A.,199620157166Richardson, A.D., S.P. Duigan and G.P. Berlyn,2002153185194Samdur, M.Y., A.L. Singh, R.K. Mathur, P. Manivel, B.M. ChiKani, H.K. Gor and M.A. Khan,2000Arachis hypogaea L.) genotype tolerant to iron deficiency chlorosis.]]>79211214Sheshshayee, M.S., H. Bindumadhava, N.R. Rachaputi, T.G. Prasad, M. Udayakumar, G.C. Wright and S.N. Nigam,2006148715This, D., C. Borries, I. Souyris and B. Teulat,2000302023Turner, F.T. and M.F. Jund,19943410011005Uddling, J., J. Gelang-Alfredsson, K. Piikki and H. Pleijel,2007913746Van der Mescht, A., J.A. de Ronde and F.T. Rossouw,199995407412Wright, G.C., K.T. Hubick, G.D. Farquhar and R.C. Nageswara Rao,19931993pp: 247-267pp: 247-267Wright, G.C. and R.C. Nageswara Rao,19941994pp: 281-325pp: 281-325Wu, F.B., L.H. Wu and F.H. Xu,1998Gossypium hirsutum L.).]]>56309314