Torreya grandis seed after-ripening treatment method for promoting embryo development

Abstract

The invention relates to a torreya grandis seed after-ripening treatment method for promoting embryo development, used for gymnosperm taxaceae torreya.. Pearlite or river sand is soaked by clear water under the condition that no water is dropped when the pearlite or the river sand is held by hands and a soaked pearlite or river sand layer is paved at the bottom of a container, then torreya grandis seeds are placed in a layer way, and the soaked pearlite or river sand layer is covered on the torreya grandis seeds, and then other seeds are placed again, and then the soaked pearlite or river sand layer is covered on the seeds by parity of reasoning until the upper part of the container is covered by the pearlite or river sand layer; then poikilothermic treatment is carried out for 90-100 days; inspection is carried out and the pearlite or river sand is maintained to be moist, and no water is accumulated; after the seeds are subjected to after-ripening treatment for 90 days by adopting the method, not only reaches embryo development rate up to more than 95%, and dissection shows that torreya grandis grow to a fresh green mature embryo with the length of being about 2cm from a flavescent young embryo with the length of being about 0.001cm and the size same as that of a needle point, and the mature embryo almost penetrates trough the whole torreya grandis seed; and secondly, the torreya grandis seed after-ripening treatment method disclosed by the invention is applicable to sowing, raising seedling and tissue culture of the mature embryo, cotyledons, embryo, embryonic axis and endosperm of the torreya grandis and is also applicable to all torreya plants in the world.

Description

technical field [0001] The invention relates to a method for post-ripening treatment of Torreya seeds for promoting embryo development of gymnosperm plants of the genus Torreya yew, and belongs to the field of post-ripening treatment methods for Torreya seeds. Background technique [0002] Torreya ( Torreya grandis ) is a gymnosperm Taxaceae ( Taxaceae ) Torreya ( Torreya ), an evergreen tree with dioecious plants, is a relict plant of the Cenozoic Tertiary Ice Age. It is a rare and precious tree species that only survives in my country. It is also one of the rare gymnosperms in the world. It is known as the "living fossil" of gymnosperms. And it is a precious multi-purpose economic dried fruit tree species unique to my country. There are 7 species of Torreya, 4 in my country, 2 in the United States, and 1 in Japan. Torreya has a long life span, up to hundreds or even thousands of years. Old trees are also quite productive. Similar to ginkgo, they are a kind of "storag...

AI Technical Summary

Problems solved by technology

The economic value of torreya is very high, and it is a special product dried fruit in my country. With the development of torreya industry, torreya has been widely developed and utilized in fields such as food, health care, medicine, timber, and greening. The childhood period is long, and the seedlings can only bloom and bear fruit after 12-20 years. The conventional breeding cycle is long, which seriously affects the variety improvement of Torreya chinensis; the second is that the germination rate of seeds is only about 35%