Study on gametophyte vegetative growth ofUndaria pinnatifida and its applications

Pang Shao-jun; Wu Chao-yuan

doi:10.1007/BF02850381

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Study on gametophyte vegetative growth ofUndaria pinnatifida and its applications

Updated：2023-05-16

- Study on gametophyte vegetative growth ofUndaria pinnatifida and its applications
- Journal of Oceanology and Limnology Vol. 14, Issue 3, Pages: 205-210(1996)
- Affiliations：
  
  Institute of Oceanology
- Author bio：
- Funds：
- DOI：10.1007/BF02850381
  CLC：
- Online First：31 January 2013，
  
  Published：1996
- Accepted：
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Shao-jun, P., Chao-yuan, W. Study on gametophyte vegetative growth ofUndaria pinnatifida and its applications., Chin. J. Ocean. Limnol. 14, 205–210 (1996). https://doi.org/10.1007/BF02850381
DOI：

Shao-jun, P., Chao-yuan, W. Study on gametophyte vegetative growth ofUndaria pinnatifida and its applications., Chin. J. Ocean. Limnol. 14, 205–210 (1996). https://doi.org/10.1007/BF02850381 DOI：

摘要

Abstract

When cultured under certain environmental conditions (25°C

light intensity 80 μmol/m2·s

LD 12/12

in enriched seawater medium with 7×10−4 mol/L NO3−N

1.56×10−4 mol/L

PO4−P and supplements of other elements like Mn

etc.)

male and female gametophytes ofU. pinnatifida kept growing vegetatively and propagated fast at average daily fresh weight increase rate of about 20%. The empirical formulaG m=G o·3m was established to estimate the output of vegetative gametophytes. Vigorous vegetative gametophyte cells began to form reproductive structures (oogonium and spermatangium

when the temperature was lower than 25°C and other environmental factors were kept optimal. The sufficient supply of gametophyte cells provided enough seeds for raisingUndaria sporelings on production scale. Controlled cross-breeding experiments using selected male and female gametophyte clones which increase their cell number by mitosis instead of meiosis were also carried out in vitro. Juvenile sporophytes from the cross-breeding had almost the same length and width increase rates as those of the control. The fact that vegetative gametophytes can be purposely selected

propagated quickly

cross-bred

with the resulting sporophytes having almost the same characteristics leads to a new way to select desiredUndaria strains for long time use without losing the desired economic characteristics.

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references

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