Table 2 Effect of drought stress and PGPR application on leaf area, specific leaf area, leaf dry matter content and number of leaves per plant in two potato cultivars.

From: Plant growth promoting rhizobacteria alleviates drought stress in potato in response to suppressive oxidative stress and antioxidant enzymes activities

Cultivars

PGPR Treatments

Drought treatments

Leaf area/plant (cm2)

Specific leaf area (cm2/g)

Leaf dry matter content (mg/g)

Number of leaves/plant

Santae

With PGPR

CK

42.3 ± 2 a

245.1 ± 8 a

300.3 ± 14 d

20.3 ± 1.4 a

MS

36.5 ± 1 c

200.5 ± 6 c

317.5 ± 15 b

17.5 ± 1.5 b

SS

13.3 ± 3 e

130.3 ± 7 e

332.7 ± 13 a

12.7 ± .3 c

Without PGPR

CK

37.6 ± 1.2 b

205.3 ± 9 b

307.3 ± 10 c

17.3 ± 5 b

MS

30.6 ± 1.5 d

150.3 ± 11 d

316.3 ± 12 b

16.3 ± 2 c

SS

7.3 ± 0.5 f.

100.7 ± 6 f.

330.3 ± 12 a

10.3 ± 2 d

PRI-Red

With PGPR

CK

45.4 ± 1 a

242.3 ± 10 b

317.4 ± 12 f.

17.4 ± 1.2 a

MS

32.5 ± 2 b

180.3 ± 8 c

336.3 ± 12 c

16.3 ± 2 b

SS

11.5 ± 0.5 d

119 ± 5 e

351.2 ± 15 b

11.2 ± 1.5 c

Without PGPR

CK

44.5 ± 1 a

250.3 ± 3 a

327.2 ± 13 d

17.2 ± 1 a

MS

23.6 ± 0.6 c

152.4 ± 7 d

339.1 ± 12 c

16.1 ± 1 b

SS

9.4 ± 0.5 e

100.6 ± 5 f

360 ± 8 a

10 ± 2 c

  1. Plants of both genotypes were treated with 100 g of bio-fertilizer at 10 days after germination and exposed to different soil relative water contents (SRWC), including 80 ± 5% (well watered; CK), 60 ± 5% (moderate stress; MS) and 40 ± 5% SRWC (severe stress; SS) for 7 days at tuber initiation stage (30 days after germination). Lowercase letter after each data in the column indicates significant difference at P < 0.05 between the treatments for each cultivar separately.
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