The Epiphytic Fern Elaphoglossum luridum (Fée) Christ. (Dryopteridaceae) from Central and South America: Morphological and Physiological Responses to Water Stress

Table 2

Rapid light curve (RLC) parameters plotted as ETR () versus irradiance () in sporophytes of Elaphoglossum luridum under different treatments. The data are presented as mean ± SD. Lowercase letters indicate the treatments differentiated by ANOVA (between columns) followed by Tukey’s test; ( sample/curves = 3/30). : scaling constant for the height of the light curve; ETR_max: maximum electron transport rate; : optimal irradiance; and : scaling constant for the -axis of the light curve.

	Control	Water deficit	ABA stress
(mol photon m^−2 s^−1)	1.208 ± 81.0^a	884.0 ± 67.0^b	1.004 ± 33.0^b
ETRmax (mol electron m^−2 s^−1)	76.0 ± 9.0^a	37.0 ± 8.0^b	51.0 ± 2.0^b
Alpha ()	0.172 ± 0.008^a	0.110 ± 0.01^c	0.137 ± 0.001^b
()	196.0 ± 35.0	102.0 ± 24.0	139.0 ± 6.0
()	0.0008 ± 0.0001	0.0011 ± 0.0001	0.0001 ± 0.00004
Correlation coefficient	0.978	0.956	0.966
sample/curves	3/30	3/30	3/30