A procedure for maize genotypes discrimination to drought by chlorophyll fluorescence imaging rapid light curves

de Sousa, Carlos Antônio Ferreira; de Paiva, Dayane Silva; Casari, Raphael Augusto das Chagas Noqueli; de Oliveira, Nelson Geraldo; Molinari, Hugo Bruno Correa; Kobayashi, Adilson Kenji; Magalhães, Paulo Cesar; Gomide, Reinaldo Lúcio; Souza, Manoel Teixeira

doi:10.1186/s13007-017-0209-z

Plant Methods

Table 1 Correlation coefficients among gas exchange and chlorophyll fluorescence parameters derived at each light step of rapid light curves

From: A procedure for maize genotypes discrimination to drought by chlorophyll fluorescence imaging rapid light curves

PAR	GEM	Chlorophyll fluorescence parameter
PAR	GEM	F	Fm′	Y(II)	Y(NPQ)	Y(NO)	NPQ	qN	qP	qL	PS/50
0	A	−0.52**	0.28^ns	0.58**	−0.62**	−0.57**	0.33*	−0.19^ns	0.50**	0.53**
	gs	−0.52**	0.22^ns	0.53**	−0.59**	−0.52**	0.30^ns	−0.22^ns	0.44**	0.47**
	Ci	0.25^ns	−0.29^ns	−0.49**	0.36*	0.49**	−0.35*	−0.10^ns	−0.50**	−0.51**
	E	−0.51**	0.28^ns	0.58**	−0.62**	−0.57**	0.34*	−0.20^ns	0.49**	0.52**
20	A	−0.47**	0.38*	0.71**	−0.73**	−0.66**	−0.63**	−0.68**	0.76**	0.60**	0.76**
	gs	−0.49**	0.31*	0.66**	−0.67**	−0.62**	−0.56**	−0.60**	0.73**	0.61**	0.72**
	Ci	0.22^ns	−0.37*	−0.56**	0.56**	0.52**	0.47**	0.55**	−0.55**	−0.37**	−0.56**
	E	−0.46**	0.38*	0.71**	−0.73**	−0.66**	−0.62**	−0.67**	0.76**	0.59**	0.76**
55	A	−0.33*	0.58**	0.83**	−0.87**	−0.64**	−0.81**	−0.84**	0.80**	0.72**	0.85**
	gs	−0.38*	0.50**	0.78**	−0.81**	−0.60**	−0.74**	−0.76**	0.77**	0.73**	0.80**
	Ci	0.11^ns	−0.50**	−0.61**	0.61**	0.50**	0.58**	0.62**	−0.59**	−0.44**	−0.60**
	E	−0.33*	0.57**	0.82**	−0.86**	−0.63**	−0.80**	−0.83**	0.79**	0.71**	0.84**
110	A	0.03^ns	0.71**	0.90**	−0.93**	−0.43**	−0.88**	−0.89**	0.79**	0.66**	0.92**
	gs	−0.05^ns	0.62**	0.87**	−0.87**	−0.45**	−0.82**	−0.82**	0.77**	0.68**	0.88**
	Ci	−0.16^ns	−0.55**	−0.61**	0.61**	0.33*	0.57**	0.61**	−0.59**	−0.38*	−0.60**
	E	0.03^ns	0.70**	0.89**	−0.92**	−0.43**	−0.87**	−0.88**	0.79**	0.66**	0.91**
185	A	0.34*	0.76**	0.90**	−0.95**	0.19^ns	−0.93**	−0.90**	0.80**	0.58**	0.91**
	gs	0.24^ns	0.68**	0.88**	−0.90**	0.09^ns	−0.87**	−0.83**	0.80**	0.63**	0.90**
	Ci	−0.34*	−0.56**	−0.55**	0.60**	−0.16^ns	0.54**	0.60**	−0.49**	−0.26^ns	−0.54**
	E	0.32*	0.74**	0.89**	−0.94**	0.16^ns	−0.91**	−0.88**	0.80**	0.59**	0.91**
280	A	0.44**	0.73**	0.91**	−0.94**	0.45**	−0.91**	−0.85**	0.85**	0.67**	0.92**
	gs	0.34*	0.65**	0.91**	−0.89**	0.35**	−0.85**	−0.78**	0.86**	0.71**	0.91**
	Ci	−0.42**	−0.55**	−0.49**	0.57**	−0.40**	0.54**	0.59**	−0.43**	−0.24^ns	−0.49**
	E	0.42**	0.71**	0.91**	−0.92**	0.42**	−0.90**	−0.83**	0.85**	0.68**	0.91**
335	A	0.47**	0.71**	0.91**	−0.93**	0.50**	−0.89**	−0.83**	0.87**	0.73**	0.92**
	gs	0.38*	0.64**	0.90**	−0.89**	0.41**	−0.83**	−0.76**	0.87**	0.76**	0.91**
	Ci	−0.44**	−0.55**	−0.50**	0.58**	−0.43**	0.55**	0.59**	−0.43**	−0.26^ns	−0.50**
	E	0.45**	0.70**	0.91**	−0.92**	0.47**	−0.87**	−0.81**	0.87**	0.74**	0.92**
395	A	0.46**	0.70**	0.90**	−0.92**	0.47**	−0.86**	−0.81**	0.87**	0.76**	0.91**
	gs	0.38*	0.63**	0.89**	−0.88**	0.39**	−0.80**	−0.75**	0.87**	0.79**	0.90**
	Ci	−0.43**	−0.53**	−0.48**	0.53**	−0.38**	0.52**	0.57**	−0.43**	−0.29^ns	−0.48**
	E	0.44**	0.68**	0.89**	−0.90**	0.44**	−0.84**	−0.79**	0.87**	0.77**	0.90**
460	A	0.44**	0.68**	0.88**	−0.90**	0.43**	−0.83**	−0.81**	0.87**	0.78**	0.90**
	gs	0.36**	0.61**	0.87**	−0.86**	0.36*	−0.77**	−0.75**	0.86**	0.80**	0.89**
	Ci	−0.41**	−0.53**	−0.46**	0.51**	−0.36*	0.50**	0.57**	−0.41**	−0.28^ns	−0.46**
	E	0.43**	0.67**	0.88**	−0.88**	0.40*	−0.81**	−0.79**	0.86**	0.78**	0.89**

Abbreviations: photosynthetically active radiation (PAR, µmol photons m⁻² s⁻¹); gas exchange measurements (GEM); net CO₂ assimilation rate (A); stomatal conductance to water vapor (gs); intercellular CO₂ concentration (Ci); transpiration rate (E); fluorescence yield (not necessarily in the steady-state) before application a saturate pulse (F); quantum yield of nonregulated energy dissipation [Y(NO)]; maximum fluorescence yield on light-adapted leaf (Fm′); effective PSII quantum yield [Y(II)]; coefficient of non-photochemical quenching (qN, lake model); quantum yield of regulated energy dissipation [Y(NPQ)]; non-photochemical quenching (NPQ); coefficient of photochemical quenching (qP, puddle model); coefficient of photochemical quenching (qL, lake model); apparent rate of photosynthesis (PS/50)
^ns,*^,** Not significantly different, significant at the 5 and 1% probability levels, respectively

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ISSN: 1746-4811

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