220
Fábio Luiz Partelli et al.
120
Magnesium in fruits, % of total
110
ì ï
Early (Clone 12V): Yˆ = 108.35/ íï1 + e ï îï
100
é (DAA - 118.08) ù ü -ê ú ïï 2 35.98 ë û ; r = 0.96 * * ý ï þï
90 80 70 60
Intermediate (Clone 10V): ì é (DAA - 122.98) ù ü -ê ï úû ïï 2 40.22 ˆ = 102.93/ ïí1 + e ë Y ý; r = 0.96 * * ï ï ïþ ïî
50 Late (Clone 13V):
40
ì é (DAA - 89.41) ù ü -ê ï úû ïï 2 21.64 ˆ = 90.83/ ïí1 + e ë Y ý; r = 0.97 * * ï ï ïî ïþ
30 20 10
Very late (Clone Ipiranga 501): Yˆ = 5.1362 ´1.0098DAA ; r 2 = 0.96 * *
0 20
48
76
104
132
160
188
216
244
272
300
Day after anthesis
Figure 6. Accumulation of magnesium in fruits (in percentage of the cumulative total) of four genotypes (clones) of Conilon coffee, from anthesis to fruit maturation. The bars refer to the standard error of the average. ** significant at 1 % probability.
120
Sulfur in fruits, % of total
110
Early (Clone 12V):
ì é (DAA - 117.26) ù ü -ê ï ú ïï 2 30.35 û ; r = 0.97 * * ˆ = 104.62/ íï1 + e ë Y ý ï ï îï þï
100 90 80 70 60
Intermediate (Clone 10V): ì é (DAA - 120.57) ù ü -ê ï ú ïï 2 33.69 û ; r = 0.98 * * ˆ = 95.30 / ïí1 + e ë Y ý ï ï ïî ïþ
50
Late (Clone 13V): ì é (DAA - 115.61) ù ü -ê ï úû ïï 2 43.15 ˆ = 93.02 / ïí1 + e ë Y ý; r = 0.92 * * ï ï ïî ïþ
40 30 20 10
Very late (Clone Ipiranga 501):
0 20
48
76
104
132
160
188
ì é (DAA - 227.85) ù ü -ê ï úû ïï 2 51.73 ˆ = 125.27 / ïí1 + e ë Y ý; r = 0.98 * * ï ï ïþ ïî
216
244
272
300
Day after anthesis
Figure 7. Accumulation of sulphur in fruits (in percentage of the cumulative total) of four genotypes (clones) of Conilon coffee, from anthesis to fruit maturation. The bars refer to the standard error of the average. ** significant at 1 % probability.
Sulphur was sigmoidally accumulated, and the highest rates were observed at the early stages of fruit formation. This behavior was similar to that reported for C. arabica Caturra, for which more than 43 % of S was accumulated from 60 to 90 days after anthesis (Ramírez et al., 2002), which corresponds to the of rapid expansion stage. However, the varieties IAC99, Rubi MG-1192 and Acaiá IAC-474-19, under the
R. Bras. Ci. Solo, 38:214-222, 2014
conditions of the Brazilian Zona da Mata, showed two S absorption peaks: the first, at the stage of rapid expansion; and the second, at the stage of grain filling and ripening (Laviola et al., 2009). The second stage is associated with protein synthesis in seeds, and its absence in the genotypes of C. canephora studied may be due to genetic factors, growing conditions or the interval between grain collections.