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. 2025 Mar 21;13:e19133. doi: 10.7717/peerj.19133

Table 2. Analysis of variance and main effects of cultivar and drought stress on stomatal density, stomatal size, leaf temperature, relative water content, and membrane stability index of red beet and sugar beet.

Factor	Stomata density (number mm⁻²)	Stomata size (µm²)	Leaf temperature (°C)	Relative water content (%)	Membrane stability index (%)
Drought (A)
Control	158^c	433^a	22.5^b	83.2^a	83.8^a^†
10% PEG	190^b	361^b	22.9^a	76.0^b	81.7^b
20% PEG	215^a	342^c	23.3^a	65.8^c	71.5^c
Cultivar (B)
Bicores	146^d	418^a	23.3^ab	74.1^b	73.9^d
BT Pancina	186^c	379^bc	22.6^c	79.1^a	81.8^ab
Yakut	182^c	371^bc	23.5^a	73.9^b	75.3^d
Mohican	197^b	381^b	22.4^c	79.2^a	83.8^a
Orthega KWS	218^a	368^c	22.7^bc	71.0^c	80.9^b
Valentina	197^b	355^d	22.9^abc	72.6^bc	78.3^c
Analysis of variance
A	^**	^**	^**	^**	^**
B	^**	^**	^**	^**	^**
A× B	^**	^**	^**	^**	^**

Notes.

^†

Different superscript letters within each column refer to significance levels at p < 0.05.

^**

Significant at p < 0.01.