Responses of Cell Wall Components to Low Nitrogen in Rapeseed Roots

Rapeseed (Brassica napus L.) is a major oil crop in China, with the world’s largest planted area and total yield. has high demand for nitrogen (N), deficiency soil an important limiting factor rapeseed production. However, responds to N deprivation by regulating its own morphology, structure, physiology. We carried out current experiment utilizing low (LN: 0.3 mM NO3?) normal (CK: 6.0 treatments using Brassica as experimental material. The study results showed that induced root elongation rapeseed, length of LN treatment was 2.37 times HN treatment. dry matter roots also significantly increased due Meanwhile, decreased photosynthetic pigment (including chlorophyll a, b, carotenoids) contents mass accumulation leaves. A higher root/shoot ratio physiological efficiency were observed under changes cell wall components (pectin, cellulose, hemicellulose, lignin), related enzymes, genes’ transcription levels determined suggested promoted demethylation ion-bound pectin (ISP) covalently bound (CSP), content CSP cellulose. methylesterase (PME) activity, inhibited cellulose degradation up/downregulation genes confirming components. N-increased degree walls conducive loosening synthesis during division elongation, ultimately promoting root-adaptive elongation. revealed possible mechanism which alteration component structure participates expansion, directly induces deficiency. successful implementation this research may be facilitating development cultivars use through root-based genetic improvements improving plant adaptability N.