HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Chen, J. J. Articles by Sung, J. M. Search for Related Content PubMed Articles by Chen, J. J. Articles by Sung, J. M. Agricola Articles by Chen, J. J. Articles by Sung, J. M.

Gas Exchange Rate and Yield Responses of Virginia-type Peanut to Carbon Dioxide Enrichment

Dep. of Agronomy, Natl. Chung Hsing Univ., Taichung, Taiwan 40227, Republic of China

^* Corresponding author.

Poor seed fill and resultant seed-coat shriveling occur commonly on Virginia-type peanut (Arachis hypogaea L.) grown in Taiwan. The phenomenon may be linked to the limitation in photosynthate supply at seed filling. The objective of this study was to evaluate the effect of CO₂ enrichment (1000 µL CO₂ L^–1) and depegging on CO₂ exchange rate (CER) and yield responses of pot-grown Virginia-type peanut. Carbon dioxide enrichments were applied to the plants at pod filling. Depegging effect was examined contrasting the controls and the plants maintaining 38 to 40 pegs throughout the growing period. The results indicated that short-term CO₂ enrichment (CO₂ treatment for 10 d) improved leaf and canopy CER. Long-term CO₂ enrichment (CO₂ treatments throughout pod filling) tended to ease leaf ribulose 1,5-bisphosphate carboxylase/oxygenase (rubisco) and chlorophyll (chl) deteriorations. Electrophoresis patterns of leaf soluble protein extracts confirmed this finding. Seed yield per plant was increased with high CO₂ treatment applied at seed-filling period, but the production of marketable seeds was improved only in the plants receiving CO₂ and depegging treatments. The poor seed-fill characteristic observed in Virginia-type peanut is attributed to excessive sink load and low canopy CER.

Received for publication August 31, 1989.