Effects of plant residue, root exudate and juvenile plants of rapeseed (Brassica napus l.) on the germination, growth, yield, and quality of subsequent crops in successive and rotational cropping systems

Satoko Yasumoto, Kanako Suzuki, Morio Matsuzaki, Shuntaro Hiradate, Kenji Oose, Hisako Hirokane, Kensuke Okada

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Double-low rapeseed cultivars that produce no erucic acid and have only a small amount of glucosinolates are widely used. However, the roots in mature plant residue and leaves and roots of these seedlings still contain a large amount of biologically active glucosinolates, and it is important to clarify the effect of rapeseed cultivation on the subsequent crops. We analyzed the biological activities of the tissues of double-low cultivar at harvest. The laboratory bioassays revealed that the seeds and roots of mature rapeseed plants contained some autotoxic components that were volatile and water-soluble. We also analyzed the effects of root exudates from growing rapeseed plants on rapeseed germination and growth using the stair-step method and found that the root exudates were autotoxic. In the field, we investigated the allelopathic effects of rapeseed plants on the growth, yield, and quality of the subsequent sunfl ower plant in the same field. The growth, yield and thousand kernel weight of sunfl ower were reduced by the preceding cultivation of rapeseed. There were many spontaneously germinated juvenile rapeseed plants in the sunfl ower field preceded by rapeseed cultivation. Analysis of the plant and soil nitrogen (N) indicated that the growth reduction of sunfl ower was not caused by the competition for N with the spontaneously germinated juvenile rapeseed plants. The main factors responsible for poor sunflower growth under field after the cultivation of rapeseed were suggested to be some non-volatile, water-soluble components produced by the roots of the spontaneously germinated juvenile rapeseed.

Original languageEnglish
Pages (from-to)339-348
Number of pages10
JournalPlant Production Science
Volume14
Issue number4
DOIs
Publication statusPublished - Sep 30 2011
Externally publishedYes

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crop quality
plant residues
root exudates
rapeseed
Brassica napus
cropping systems
germination
glucosinolates
erucic acid
cultivars
mature plants
seeds
growth retardation
Helianthus annuus
bioactive properties
bioassays
water

All Science Journal Classification (ASJC) codes

  • Agronomy and Crop Science

Cite this

Effects of plant residue, root exudate and juvenile plants of rapeseed (Brassica napus l.) on the germination, growth, yield, and quality of subsequent crops in successive and rotational cropping systems. / Yasumoto, Satoko; Suzuki, Kanako; Matsuzaki, Morio; Hiradate, Shuntaro; Oose, Kenji; Hirokane, Hisako; Okada, Kensuke.

In: Plant Production Science, Vol. 14, No. 4, 30.09.2011, p. 339-348.

Research output: Contribution to journalArticle

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