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Correlation between haemolymph juvenile hormone titre, corpus allatum volume, and corpus allatum in vivo and in vitro activity during oocyte maturation in a cockroach (Nauphoeta cinerea)






General and Comparative Endocrinology, 363: 339-345

Correlation between haemolymph juvenile hormone titre, corpus allatum volume, and corpus allatum in vivo and in vitro activity during oocyte maturation in a cockroach (Nauphoeta cinerea)

Characteristic changes in haemolymph juvenile hormone (JH) titre, corpus allatum (c.a.) volume and c.a. in vivo and in vitro activity occurred during the oocyte maturation phase of the ovoviviparous cockroach Nauphoeta cinerea (Ol.). When oocyte growth proceeded at its highest rate, the c.a. volume and in vitro activity as well as the JH titre in haemolymph were highest, indicating a positive correlation between these parameters. However, no correlation between c.a. in vitro activity and haemolymph JH titre was detectable if individual females in a stage of rapid oocyte growth were investigated. This suggests that JH is possibly synthesised in pulses and not continuously. The in vivo activity of transplanted c.a. was different from their in vitro activity, and it seems that the in vitro activity reflects the rate of JH production at the time of dissection while the in vivo activity is indicative of the JH-producing potential under certain influences of the surrounding medium.

Accession: 000623587

PMID: 744470

DOI: 10.1016/0016-6480(78)90115-6

Download PDF Full Text: Correlation between haemolymph juvenile hormone titre, corpus allatum volume, and corpus allatum in vivo and in vitro activity during oocyte maturation in a cockroach (Nauphoeta cinerea)



Related references

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