Response of seed germination of three xeromorphic shrubs to drought stress

Abstract

Abstract: The seed germination, seedling growth and water absorption characteristic of Caragana korshinskii, Hedysarum scoparium, and Artemisia sphearocephala were investigated under different osmotic potentials (PEG 6000, -0.3～-2.7MPa). The results showed that under drought stress, C.korshinskii had the highest germination rate, while A.sphearocephala had the lowest one.Under -0.3～-0.6MPa, the root length of 10 day old A.sphearocephala seedling was significantly longer than that of H. scoparium and Caragana korshinskii (P<0.05),and the length reached 7.9, 4.5 and 3.1cm, respectively. There existed a significant positive correlation between seed germination rate and 72h water absorption rate of the three shrub seeds(P<0.01). The relationships among germination characteristics, root length, and survive percentage of seedlings were also discussed.

CLC Number:

S793.01

ZENG Yanjun, WANG Yanrong, SA Ren, TIAN Xuemei . Response of seed germination of three xeromorphic shrubs to drought stress[J]. Chinese Journal of Applied Ecology, 2002, (8): 953-956.

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