Progressive drought alters architectural and anatomical traits of rice roots

Rice

Table 1 Pearson’s correlations among root and shoot traits of 11 Egyptian rice cultivars under well-watered conditions

	Max. root depth	Large LRBD	Small LRBD	Large LRL	Small LRL	Cross section area	Stele area	Median MV area	Total MV area	MV No.	Theor. cond.	Shoot dry biomass	Tiller No.
Max. root depth	1
Large LRBD	−0.135	1
Small LRBD	−0.187	0.192	1
Large LRL	0.245	0.208	−0.276	1
Small LRL	−0.183	0.063	−0.111	0.733^**	1
Cross section area	0.484^**	0.017	−0.081	0.173	0.068	1
Stele area	0.414^*	−0.271	−.538^**	0.275	0.205	0.563^**	1
Median MV area	0.224	−0.008	0.303	0.145	0.259	0.342	0.267	1
Total MV area	0.548^**	0.020	−0.364^*	0.346^*	0.170	0.839^**	0.630^**	0.080	1
MV No.	−0.398^*	0.279	0.201	0.349^*	0.504^**	−0.199	−0.003	0.237	−0.280	1
Theor. cond.	0.023	0.109	0.395^*	0.207	0.337	0.137	0.191	0.871^**	−0.120	0.631^**	1
Shoot dry biomass	0.624^**	−0.399^*	−0.475^**	0.275	0.034	0.616^**	0.568^**	0.006	0.752^**	−0.270	−0.161	1
Tiller No.	0.259	−0.436^*	−0.302	0.200	0.339	0.456^**	0.664^**	0.502^**	0.378^*	−0.016	0.372^*	0.451^**	1

LRBD Lateral root branching density, LRL Lateral root length, MV Metaxylem vessel, Theor. cond Theoretical conductance, Max Maximum, and No. Number significance indicated by * p ≤ 0.05; ** p ≤ 0.01