Method for improving self-pollination capacity of tobacco under abiotic stress

Abstract

A method for improving self-pollination capacity of tobacco under abiotic stress concretely includes the steps that during a squaring stage and a flowering stage of the tobacco, when the tobacco encounters with abiotic stress such as low temperature and a drought, stamens are lower than pistils, and the self-pollination capacity is lowered, a gibberellins solution with the concentration of 50-100 mg / L is sprayed to flowering branches, 30 ml of the gibberellins solution is sprayed on each plant averagely and sprayed once every five days, and spraying is stopped when stress disappears. Extension of the stamens and the pistils is adjusted and controlled, the stamens are made to extend faster than the pistils, the good self-pollination condition that the four stamens are higher than pistil stigmas, and one stamen is lower than the pistil stigmas is achieved, the self-pollination capacity and the selfing setting percentage of the tobacco are improved, flowering and fruiting are promoted, and the seed yield is increased.

Description

technical field [0001] The invention belongs to the technical field of tobacco seed propagation and relates to a method for improving the self-pollination ability of tobacco under abiotic adversity stress. Background technique [0002] Tobacco is a hermaphroditic, self-pollinated plant with 1 pistil and 5 stamens. Normal tobacco flower stamens are 4 long and 1 short, and the pistil stigma is in the middle, that is, 4 stamens are higher than the pistil stigma, and 1 stamen is lower than the pistil stigma. After the flower opens, the pollen is scattered on the stigma of the pistil of the same flower by the wind to carry out self-pollination. [0003] The length of tobacco pistil and stamen is not only closely related to its own genetic factors, but also easily affected by environmental factors, especially stamens are more sensitive to the environment. During the budding and flowering stages, if encountering low temperature, drought and other abiotic stresses, all five stamen...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the problem that the stamens under abiotic adversity stress are obviously lower than the pistil stigma in the reproduction of tobacco seeds, and the self-pollination ability and self-fertilization rate decrease, resulting in reduced seed production or even no harvest, and provides a method for improving abiotic adversity stress Method for increasing tobacco seed yield by reducing self-pollination ability of tobacco