Table 1.

Plant growth under sulfate deprivation in terms of dry mass accumulation rate, the percentage change in the dry shoot and root mass allocation in –S plants relative to control, and root : shoot ratio

Accumulation rate (g d−1)

% change in dry mass of –S relative to C

Root : shoot ratio

Day

ShootC

Shoot-S

RootC

Root-S

Shoot

Root

C

–S

0

0

0

0·45 ± 0·10

0·45 ± 0·10

6

0·028 ± 0·010

0·017 ± 0·010

0·012 ± 0·005

0·012 ± 0·004

–18·9

0

0·43 ± 0·11

0·53 ± 0·11

12

0·080 ± 0·018

0·040 ± 0·017

0·025 ± 0·008

0·025 ± 0·007

–36·5

25·8

0·36 ± 0·07

0·72 ± 0·14

18

0·095 ± 0·033

0·043 ± 0·027

0·017 ± 0·012

0·060 ± 0·017

–43·7

63·4

0·29 ± 0·06

0·84 ± 0·19

C, Control plant; –S: sulfate-deprived plant.

Growth analysis was based on 300 seedlings.

Data represent the mean values ± standard error (number of measurements n = 15).