000			01572nam a2200193Ia 4500
008			220216s9999 xx 000 0 und d
100			_aPremakumari D
245		0	_aCorrelation of the characters of petiolar stomata with leaf retention after the incidence of phytophthora leaf fall disease in Hevea brasiliensis (Willd. ex. Adr. de Juss.) Muell. Arg.
260			_bIndian Journal of Natural Rubber Research _c1988
300			_a22-26
520			_aThe characters of petiolar stomata and the leaf retention percentage after the incidence of Phytophthora leaf fall disease in Hevea brasiliensis (Willd. ex Adr. de Juss) Muell. Arg. was studied in six Hevea clones. Considerable differences between disease resistant and susceptible groups of clones were observed for leaf retention percentage, no. of stomata/10mm2 length of stomatal aperture and aperture index. Leaf retention percentage had negative correlations with no. of stomata/10mm2(P<0.01), length of stomatal aperture (P<0.05) and the aperture index (P<0.01). Partial and multiple correlations showed the importance of the frequency of petiolar stomata and the aperture index as criteria for selection of disease resistant clones. About 68 per cent variation in leaf retention after the incidence of Phytophthora leaf fall disease could be explained by the characters of petiolar stomata.
650			_aDisease resistance
650			_aHevea brasiliensis
650			_aPetiolar stomata
650			_aPhytophthora leaf fall disease
700			_aPanikkar A O N
700			_aSethuraj M R
942			_cJS
999			_c56403 _d56403