A method for improving tobacco self-pollination ability under abiotic stress

Abstract

A method for improving the self-pollination ability of tobacco under abiotic adversity stress, specifically, when tobacco encounters abiotic adversity stress such as low temperature and drought during the budding and flowering stages, resulting in lower stamens than pistils and reduced self-pollination ability , Spray gibberellin solution with a concentration of 50-100 mg / L on flowering branches, with an average of 30 ml of gibberellin solution per plant, spray once every 5 days, and stop spraying when the stress disappears. The invention regulates the elongation of the pistil and the stamen, makes the stamen elongate faster than the pistil, achieves good self-pollination conditions that 4 stamens are higher than the stigma of the pistil, and 1 stamen is lower than the stigma of the pistil, and improves the self-pollination of tobacco ability and self-seed setting rate, preserve flowers and promote fruit, and improve seed yield.

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