[The influence of abscisic acid treatment on desiccation tolerance in Dendrobium candidum protocorm-like bodies].
Effect of ABA on desiccation tolerance in the protocorm-like bodies (PLBs) of D. candidum was studied. The best result was obtained while ABA precultured at 5 micromol/L for 24 h (Fig.2). PLBs vitality rate was 10 times of the control after 2 h desiccation (Table 1). Detection of cytoplasmic osmoticums showed that ABA preculture could not induce the accumulations of soluble sugar, proline, etc (Tables 3, 4 and 7). But the content of soluble polysaccharide rose conspicuously (Table 5). So we think that the accumulation of soluble polysaccharide may play an important role in desiccation tolerance induced by ABA preculture.
Liu
Wei
W
College of Life Sciences, South China Normal University, Guangzhou 510631, China.
Pan
Rui-Chi
RC
Leng
Jia-Yi
JY
Ye
Qing-Sheng
QS
D000040:Abscisic Acid / Q000494:pharmacology*; D000222:Adaptation, Physiological / Q000187:drug effects* / Q000502:physiology; D031667:Dendrobium / Q000187:drug effects* / Q000378:metabolism / Q000502:physiology; D003890:Desiccation; D010937:Plant Growth Regulators / Q000494:pharmacology; D011134:Polysaccharides / Q000378:metabolism; D013997:Time Factors
D010937:Plant Growth Regulators; D011134:Polysaccharides; D000040:Abscisic Acid