Plant growth and morphology
Fresh weight of the corms was measured immediately
before they were potted (fw
1
) and after leaf senescence
(fw
2
). The fw
2
thus included the fresh weight of both the
maternal corm and its daughter corms. Relative growth rate
(RGR) of the corm was calculated as an index of individual
biomass accumulation for one growth period. Dry weight
(dw) of the corms was estimated from fw as dw
=
0.243
¥
fw
(Muraoka et al. 1997), and RGR (g g
–1
one growth period
–1
)
was calculated as,