Table 8. Partial regression coefficients(B)and standardized regression coefficients(Beta) from a multiple regression analysis of the leaf surface-trait effects on PM accumulation.

Item	TOTPM			PM10			PM2.5			PM0.2
	B	Beta	P	B	Beta	P	B	Beta	P	B	Beta	P
Constant	56.2		0.000	32.2		0.000	16.0		0.000	7.948		0.000
LA	-1.048	-0.353	0.002	-0.592	-0.342	0.004	-0.131	-0.357	0.022	-0.143	-0.294	0.000
R	5.737	0.305	0.008	2.771	0.253	0.037	1.986	0.358	0.005	0.980	0.318	0.003
Wax	0.884	0.338	0.000	0.515	0.337	0.000	0.213	0.276	0.000	0.157	0.366	0.000
SD	-0.097	-0.065	0.303	-0.032	-0.037	0.574	-0.044	-0.100	0.150	-0.020	-0.084	0.159
SL	-0.881	-0.131	0.037	-0.440	-0.112	0.089	-0.292	-0.147	0.032	-0.148	-0.134	0.023
SB	0.226	0.122	0.036	0.116	0.108	0.080	0.084	0.155	0.016	0.025	0.184	0.026
TN	0.304	0.097	0.137	0.195	0.106	0.122	0.018	0.020	0.780	0.091	0.176	0.005
R2	0.968			0.936			0.912			0.997

LA: leaf area per leaf
R: roughness of leaf surface
SD: stoma density of lower epidermis
SL: stoma length
SB: stoma breadth
TN: trichome density of lower epidermis.