Effects of Simulated Acid Rain Stress on the Germination Characteristics of Lycium ruthenicum Seeds

doi:10.11924/j.issn.1000-6850.casb2020-0706

Abstract

Abstract:

To understand the influence of acid rain stress on the germination characteristics of Lycium ruthenicum seeds, we used to the paper germination experiment to study the germination percentage (GP), relative germination percentage (RGP), germination rate (GR), relative germination rate (RGR), germination index (GI), relative germination index (RGI), vitality index (VI), relative vitality index (RVI), length of radicle (LR), length of germ (LG), radicle to germ ratio (RTGR), average germination time (AGT), heteromorphic germination percentage (HGP), and relative acid damage rate (RADR) of L. ruthenicum seeds under different degrees of simulated acid rain stress. The results showed that the simulated acid rain stress had no obvious influence on the germination indexes of L. ruthenicum seeds at pH 5, and shortened the seed AGT to a certain extent; pH 4 had no significant effect on the indexes of L. ruthenicum seeds’ GP, RGP, GR, RGR, GI, RGI, VI, RVI, but HGP and RADR increased significantly; pH 3 and pH 2 suppressed the seeds of L. ruthenicum germination obviously. The study indicates that a moderately acidic environment is more suitable for the germination of L. ruthenicum. In the actual planting practice, this feature can be used to shorten the seedling time of L. ruthenicum.

Key words: simulated acid rain stress, Lycium ruthenicum, germination percentage, germination index, heteromorphic germination percentage, relative acid damage rate, radicle to germ ratio

CLC Number:

Nie Bilin, Lv Haiying, Rumanam Nigmat, Sabrinisa Merzat. Effects of Simulated Acid Rain Stress on the Germination Characteristics of Lycium ruthenicum Seeds[J]. Chinese Agricultural Science Bulletin, 2021, 37(25): 64-70.

Figures/Tables 5

References 34

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处理组	4 d	5 d	6 d	7 d	8 d	9 d	10 d	11 d	12 d
pH 2	0	0	0	2.4	4	5.2	5.2	5.2	5.2
pH 3	0.4	2.4	10.8	20.4	27.2	31.6	31.6	31.6	31.6
pH 4	0.8	5.2	20	50.8	62.4	69.6	72.4	72.4	72.4
pH 5	0.4	5.2	22	53.6	67.2	73.2	74.4	74.8	74.8
CK	0	3.6	10.4	29.6	48.8	60.4	67.2	71.6	74

处理组	4 d	5 d	6 d	7 d	8 d	9 d	10 d	11 d	12 d
pH 2	0	0	0	2.4	4	5.2	5.2	5.2	5.2
pH 3	0.4	2.4	10.8	20.4	27.2	31.6	31.6	31.6	31.6
pH 4	0.8	5.2	20	50.8	62.4	69.6	72.4	72.4	72.4
pH 5	0.4	5.2	22	53.6	67.2	73.2	74.4	74.8	74.8
CK	0	3.6	10.4	29.6	48.8	60.4	67.2	71.6	74