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. 2022 Apr 23;12:6671. doi: 10.1038/s41598-022-10703-0

Figure 6.

Figure 6

Correlations between stomatal density and (a) stomatal conductance, (b) photosynthetic performance index (PIABS), and (c) between PIABS and phosphorus use efficiency in chickpea plants (Cicer arietinum) grown under different P fertilizer forms and irrigation regimes. Asterisks *, **, and *** denote Pearson correlation significance at p < 0.05, p < 0.01, and p < 0.001, respectively.