Data are the pooled means of three estimates each over two years ±standard deviation. 'p-value' denotes the significance of difference between the means by one way ANOVA statistics. a The values followed by different letters differ significantly by Duncan's multiple range test at p=0.05.

**\* Cul**: *Cassia uniflora* Mill.non Spreng ; **Snl**: *Synedrella nodiflora*(L) Gaertn; **Alt**: *Alternanthera tenella* Colla; **Eug**: *Euphorbia geniculata* Orteg.; **Ach**: *Achyranthes aspera* L.; **Bod**: *Boerhaavia erecta* L.; **Bln**: *Blainvillea acmella* L.; **Aca**: *Acalypha ciliata* Forsk.; **Tum:** *Triumfetta rhomboidea* Jacq.; **Cab**: *Cassia absus* L.; **Cfl:** *Cassia obtusifolia* L.; **Bdn**: *Bidens biternata* Lour.; **Raw:** *Rauwolfia tetraphylla* L.; **Opl:** *Oplismenus compositus* P.Beauv.

Table 5. Osmolytes and antioxidants in invasive and native weeds

The alien species like *Cassia uniflora, Synedrella* and *Alternanthera* have higher contents of different types of antioxidants as compared to the co- occurring invasive and native weeds at the selected sites of Pune University campus (Table 5). Along with this lower values of lipid peroxidation and higher MSI and RWC might be offering them additional mechanisms for abiotic stress tolerance. As a result of this the selected invasive weeds might have succeeded to invade and encroach over the native plants of Pune University campus even during the harsh environmental conditions.

Lipid Peroxidation T bars

> 0.03 d ± 1E-04

0.03 cd ± 0.002

0.04 d ± 1E-04

0.04 cd ± 0.061

0.05 bcd ± 0.002

0.05 bcd ± 0.03

0.08 bcd ± 0.08

0.101 bcd ± 0.003

± 0.26 0.1 bcd± 0.005 50.45 ef

0.103 bcd ± 0.004

> 0.13 bc ± 0.008

> 0.13 bc ± 0.15

> 0.17 b ± 0.007

0.36 a ± 0.02 MSI RWC

75.64 a ± 5.67

70.11ab ± 9.93

65.63 bc ± 2.45

60.76 cd ± 4.55

61.13 cd ± 3.97

> 48.44 f ± 2.99

57.36 de ± 3.15

> 47.53 f ± 4.51

± 3.095

45.53 f ± 1.15

47.38 f ± 3.554

57.94 de ± 4.34

38.66 g ± 2.51

34.57 g ± 2.593

%

64.8 a ± 5.83

49.5 b ± 12.63

41.57 c ± 5.56

27.9 de ± 3.90

36.1 cd ± 5.05

17.6 fg ± 1.40

23.4 efg ± 3.51

15.34 gh ± 2.14

19.65 efg ± 1.37

15.69 gh ± 0.62

18.83 ef ± 2.61

25.9 ef ± 3.88

15.52 gh ± 0.071

12.01 h ± 0.261

Phenols mg/g

> 8.43 a ± 2.75

> 8.22 a ± 0.61

> 8.19 a ± 0.53

6.59 abc ± 1.36

7.36 ab ± 0.47

4.59 bcd ± 1.38

6.17 abc ± 2.85

> 4.06 d ± 0.38

4.75 cd

5.82 bcd ± 1.75

6.66 abc ± 0.27

6.34 abc ± 2.74

5.69 bcd ± 0.202

4.41 cd ± 0.61
