Effects of Habitat,Temperature and Exogenous Hormones on the Organ Development of Karelinia caspia

doi:10.13560/j.cnki.biotech.bull.1985.2020-1126

Abstract

Abstract:

The growth and development of flower organs in plants are closely related to temperature,and high temperature can cause flower organs abnormal and changes in hormone content in the plant. To explore the effects of different habitats and exogenous IAA on the floral organ development of Karelinia caspia,the floral organ size of K. caspia（Female style and male filaments）under 2 habitats of desert and artificial green space and at different concentrations of IAA as well as the changes of hormone content in the floral organ were measured. Results showed that the appropriate temperature（27-30℃）promoted the growth of K. caspia flowering organs in the bud stage,while the high temperature（38-40℃）promoted the elongation of K. caspia stigma during flowering,thus affecting the growth of flower organs until maturity. External application of IAA at a certain concentration promoted the growth of K. caspia flower organs. In the desert,the IAA promotion effect of 0.3 μmol/L was the most obvious,while that in the artificial green space was 0.1 μmol/L.

Key words: high temperature stress, Karelinia caspia, exogenous hormones

BI Yuan-kun, LI Li, ZHU Chuan-ying, WANG Yan-qin. Effects of Habitat,Temperature and Exogenous Hormones on the Organ Development of Karelinia caspia[J]. Biotechnology Bulletin, 2021, 37(4): 28-34.

Figures/Tables 4

Fig. 1 Development and growth rate of floral organs in K. caspia under different habitat conditions A : Development of florets at different stages of K. caspia. B : Development of whole flower at different stages of K. caspia. C : Statistic measurement of pistil and stamen length of K. caspia in different habitats. D : Figure of floral organ growth rate of K. caspia in different habitats. * : P<0.05 significant difference. The same below

Fig.2 Measure the length of pistil and stamen while IAA applied in different habitats A : Measuring the length of pistil and stamen of IAA applied in desert environment. B : Measuring the length of pistil and stamen of IAA applied outside artificial green environment. a : CK, b : 0.1 μmol/L, c : 0.3 μmol/L, d : 0.5 μmol/L

Fig.3 Determination of IAA content in the floral organs of K. caspia under different habitat conditions **P<0.01

Fig.4 Determination of hormone content in flower organs of K. caspia with different concentration of IAA applied externally A : Effects of different concentrations of IAA on hormone content in floral organs of K. caspia. B : Changes of hormone content in flower organs of K. caspia with different concentrations of IAA applied to artificial green space. C: Changes of hormone content in floral organs of K. caspia with different concentration of IAA applied in desert

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