Year: 1972
Type: article
Abstract: gametophytes of Laminaria s a c c h a r i n a ( L . ) Lamouroux were examined i n r e l a t i o n t o s e l e c t e d n u t r i e n t s .Growth, morphology, gametogenesis and m e t a b o l i t e s were s t u d i e d i n d i f f e r e n t c o n c e n t r a t i o n s of n it r a t e , phosphate, i o d i d e , i o d a t e and c h l o r i d e / i o d i d e r a t i o s i n a x e n i c c u l t u r e , using a s y n t h e t i c seawater medium under o p t i m a l l i g h t and temperature c o n d i t i o n s .N i t r a t e and phosphate were r e q u i r e d f o r t h e v a r i o u s s t a g e s of gametophyte development and gametogenesis."under n i t r a t e and phosphate c o n c e n t r a t i o n s optimal f o r growth and gametogenesis maximum q u a n t i t i e s of DNA, RNA, p r o t e i n , carbohydrate, and c h l o r o p h y l l s a , c and low q u a n t i t i e s of l i p i d s were produced.F u r t h e r , n u t r i e n t c o n c e n t r a t i o n s which produced h i g h p e r c e n t a g e f e r t i l i t y corresponded with h i g h r a t i o s of RNA/DNA and p r o t e i n / R N ~.I o d i d e and i o d a t e were n o t e s s e n t i a l f o r a n t h e r i d i a l and oogonial p r o d u c t i o n , b u t a s m a l l a d d i t i o n of i o d i n e had a s t i m u l a t o r y e f f e c t .A t low c o n c e n t r a t i o n s , i o d i d e was more e f f e c t i v e t h a n i o d a t e .A t h i g h c o n c e n t r a t i o n s i o d a t e had a l e s s i n h i b i t o r y e f f e c t t h a n i o d i d e .I n h i b i t i o n occurred a t iii Examining Committee Approval . . . .
Source: Summit (Simon Fraser University)
Author: Stephen I. C. Hsiao
Language: English
Subfield: Oceanography
Field: Earth and Planetary Sciences
Domain: Physical Sciences
SDG: Zero hunger
Open Access status: green
OpenAlex ID: W2308466051