Bulletin of the National Research Centre

Table 6 Effect of seed hardening on proline, free amino acids, RNA, and DNA content of plant shoots

From: Enhancing thermotolerance of tomato plants (Lycopersieon esculentum mill) by heat hardening of seeds

Treatments		Parameters
Temp. (°C)	Exposure period (h)	Proline μg/g fresh wt.	Amino acids mg/g dry wt.	Proteins mg/g dry wt.	RNA mg/g fresh wt	DNA mg/g fresh wt.
Control		41.22^g	7.01^ef	29.21^e	1.01^d	0.211^c
50	0.5	42.22^g	6.61^fg	28.38^e	0.979^d	0.211^c
	1	44.77^f	7.22^e	30.00^de	1.07^c	0.219^a
	2	47.25^e	7.43^de	30.95^cd	1.10^c	0.214^bc
60	0.5	49.15^c	6.40^g	28.55^g	1.17^b	0.215^abc
	1	62.14^b	8.11^bc	32.04^c	1.23^a	0.218^ab
	2	64.48^a	9.52^ab	36.05^a	1.19^ab	0.218^ab
70	0.5	49.33^e	7.95^cd	33.93^b	1.09^c	0.217^ab
	1	55.15^c	9.92^a	31.45^c	1.01^d	0.211^c
	2	52.14^d	9.18^b	31.52^c	0.966^d	0.212^c
L.S.D at 5%		2.12	0.56	1.37	0.050	0.004

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