Impact of defoliation intensity and frequency on N uptake and mobilization in Lolium perenne
نویسندگان
چکیده
منابع مشابه
Impact of defoliation intensity and frequency on N uptake and mobilization in Lolium perenne.
The aim of the study was to evaluate the impact of defoliation intensity, defoliation frequency, and interactions with N supply on N uptake, N mobilization from and N allocation to roots, adult leaves, and growing leaves. Plants of Lolium perenne were grown under two contrasted N regimes. Defoliation intensity treatments consisted of a range of percentage leaf area removal (0, 25, 50, 75, or 10...
متن کاملShort-term changes in xylem N compounds in Lolium perenne following defoliation.
Previous studies have indicated that an increased asparagine to glutamine ratio (Asn : Gln) occurs in the xylem fluid of Lolium perenne 24 h after defoliation. However, the absolute changes in Asn and Gln leading to the increased Asn : Gln ratio are unknown. The present study tested the hypotheses that: (1) defoliation-induced changes in xylem amino acid composition occur in L perenne within th...
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The stay-green mutation of the nuclear gene sid results in inhibition of chlorophyll degradation during leaf senescence in grasses, reducing N remobilization from senescing leaves. Effects on growth of Lolium perenne L. were investigated during N starvation (over 18 d) and after severe defoliation, when leaf growth depends on the remobilization of internal N. Rates of dry mater production, part...
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ژورنال
عنوان ژورنال: Journal of Experimental Botany
سال: 2006
ISSN: 1460-2431,0022-0957
DOI: 10.1093/jxb/erj085