Growth, photosynthate partitioning and fructan accumulation in plants of Vernonia herbacea (Vell.) Rusby under two nitrogen levels

Content Provider	Scilit
Author	Cuzzuol, Geraldo Rogério Faustini de Carvalho, Maria Angela Machado Zaidan, Lilian B. P.
Copyright Year	2005
Description	The effect of two nitrogen concentrations on fructan accumulation and plant growth was analysed in plants of Vernonia herbacea during a year period. Plants of this species accumulate inulin-type fructans in the underground reserve organs (rhizophores). The plants were cultivated in glasshouse conditions and received weekly nutrient solutions containing 1.3 mmol.L-1 NO3- (N-limited) or 10.7 mmol.L-1 NO3- (N-sufficient). Plants treated with N-sufficient solution presented an increase in total growth with higher biomass, more but smaller leaves resulting in higher total leaf area, higher net assimilation rate, specific leaf mass and higher biomass allocation to aerial organs. In addition, these plants presented higher contents of reducing sugars and lower fructan contents. In contrast, N-limited plants showed reduced total growth with lower biomass, higher biomass allocation to underground organs and higher fructan contents. Therefore, although N-limited plants presented a higher fructan concentration, the amount of fructan produced per plant was similar in both N treatments.
Related Links	http://www.scielo.br/pdf/bjpp/v17n4/a08v17n4.pdf
Ending Page	410
Page Count	10
Starting Page	401
ISSN	16770420
e-ISSN	16779452
DOI	10.1590/s1677-04202005000400008
Journal	Brazilian Journal of Plant Physiology
Issue Number	4
Volume Number	17
Language	English
Publisher	FapUNIFESP (SciELO)
Publisher Date	2005-12-01
Access Restriction	Open
Subject Keyword	Brazilian Journal of Plant Physiology Underground Reserve Organs Órgãos Subterrâneos De Reserva
Content Type	Text
Resource Type	Article
Subject	Plant Science Agronomy and Crop Science