Preliminary Studies on Embryo Rescue and Seed Germination Promotion of <i>Clematis Texensis</i>

SUN Rui-qi; YU Wei-jun; ZENG Li-hui

doi:10.19303/j.issn.1008-0384.2019.09.007

Volume 34 Issue 9

Sep. 2019

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Article Navigation > Fujian Journal of Agricultural Sciences > 2019 > 34(9): 1040-1046

SUN R Q, YU W J, ZENG L H. Preliminary Studies on Embryo Rescue and Seed Germination Promotion of Clematis Texensis [J]. Fujian Journal of Agricultural Sciences，2019，34（9）：1040−1046. doi: 10.19303/j.issn.1008-0384.2019.09.007

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SUN R Q, YU W J, ZENG L H. Preliminary Studies on Embryo Rescue and Seed Germination Promotion of Clematis Texensis [J]. Fujian Journal of Agricultural Sciences，2019，34（9）：1040−1046. doi: 10.19303/j.issn.1008-0384.2019.09.007

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Preliminary Studies on Embryo Rescue and Seed Germination Promotion of Clematis Texensis

doi: 10.19303/j.issn.1008-0384.2019.09.007

1.
Fujian Agriculture and Forestry University, Fuzhou, Fujian　350002, China
2.
Fujian Forestry Vocational & Technical College, Nanping, Fujian　353000, China

Received Date: 2019-04-03
Rev Recd Date: 2019-08-09
Publish Date: 2019-09-01

Abstract

Abstract

Objective To seek means for improvement on crossbreeding the appealing, long flowering, widely adaptable bell clematis by overcoming the long dormancy and high embryo abortion in seed germination. Method Seeds of Dream King clematis (Clematis texensis) collected 45 d after pollination were cultured in vitro on various media to optimize the conditions for embryo rescue and dormancy breaking. An orthogonal experiment of 12 treatments consisting of additions of 6-BA and/or NAA in various concentrations as well as exposures to temperatures and daylight was conducted to observe the resulting seed germination and seedling survival. Result The addition of 0.5 mg·L⁻¹ 6-BA and 0.05 mg·L⁻¹ NAA to the MS basic medium improved the seed germination rate to 54%, with 47% of the seedlings reached maturation. When 10% of coconut milk was added to the medium, both seed germination and seedling survival rate were significantly raised to reach 62%. Exposure of the seeds to low temperature and day 25℃/night 15℃ promoted the germination. And, the presence of either 50 mg·L⁻¹ GA or 30 mg·L⁻¹ 6-BA in the medium facilitated breaking the seed dormancy. Conclusion Embryos of clematis could be rescued in vitro to mitigate premature abortion caused by high temperature. The growth hormone addition could significantly shorten dormancy and promote germination of the bell clematis seeds.
- bell clematis,
- hybrid,
- seed dormancy and seed gernimation,
- embryo rescue

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References(27)

References

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