Evaluation of the effects of heavy metal stress on the germination characteristics of sunflower seeds and screening of flower sea varieties

doi:10.14088/j.cnki.issn0439-8114.2023.01.021

Abstract

Abstract: To explore the effects of heavy metal stress on the germination of sunflower（Helianthus annuus L.） seeds and the screening cultivars of flower sea, 32 common sunflower cultivars were used as test materials. The effects of heavy metal stress on the germination rate, germination potential, germination index and average germination days were studied by using the method of Petri dish germination test and simulating heavy metal stress with solutions containing Pb²⁺, Cr⁶⁺, Cd²⁺, Ni²⁺, Cu²⁺ and Zn²⁺ ions. Genus function method and cluster analysis were used to screen heavy metal tolerant cultivars. The results showed that heavy metal stress promoted the seed germination of most sunflower varieties at low concentration, inhibited the seed germination at high concentration, and prolonged the average days of seed germination, the tolerance to heavy metal stress varied greatly among different cultivars. The varieties with good resistance to heavy metals were Jinfugui, Moshuhuixuan, Mantianxing, Jinyongbicui, Zuiyunchang and Huoli. 10 varieties were medium resistant to heavy metal stress, such as Huangzuan, Baoshihongfang and Hongningmeng. There were 16 varieties with resistance to heavy metal stress, such as Chushuifurong, Padixiaokui and Jintaiyang.

Key words: sunflower（Helianthus annuus L.）, heavy metal stress, seed germination, flower sea, variety screening

CLC Number:

S565.5

YU Hua-li, WEN Si-min, ZHANG Gui-ling, DONG Chuan-jie, CHENG Qian. Evaluation of the effects of heavy metal stress on the germination characteristics of sunflower seeds and screening of flower sea varieties[J]. HUBEI AGRICULTURAL SCIENCES, 2023, 62(1): 122-127.

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