Physiology and biochemistry on silique shattering resistance in Brassica napus L.

doi:10.19802/j.issn.1007-9084.2019020

Abstract

Abstract:

Shattering resistance of rapeseed (Brassica napus) fruit seriously affects yield and harvest by ma? chine. To study the physiological and biochemical features on silique shattering resistance, 2 resistant varieties (Qin? gyou 1 and its parent 0911) and 2 easy-crack materials were tested by measuring their water content, ethylene syn? thesis rate, endocellulase activity and IAA content. The results showed that synthesis rate of ethylene was similar to maturing siliques from all materials. 55 days after flowering, contents of water and IAA in silique of the shatter-re? sistant materials were significantly higher, while the peak of cellulase activity in siliques was significantly lower in resistant varieties. And the IAA content was higher in the resistant ones. It was suggested that characteristics above
were closely related to silique shattering. In the process of silique maturing and dehydration, materials with slower rate of dehydration might have stronger silique-shattering resistance. Thus the dehydration rate of maturing silique could be used as an important indicator for silique-shattering resistant rapeseed.

Key words: Brassica napus L., Qingyou 1, silique shattering resistance, physiological, biochemical, dehy? dration rate

ZHU Cheng，HUANG Tao-cui，TANG Shi-yi，LIU Xi-zhong，HU Cheng-wei . Physiology and biochemistry on silique shattering resistance in Brassica napus L.[J]. 中国油料作物学报, 2019, 41(5): 735-.

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