Iron Plaque Formation on Roots from Different Oryza rufipogon Populations

doi:10.3969/j.issn.1000-2561.2020.06.027

Abstract

Abstract:

In order to determine the effects of root characteristics on iron plaque formation on the roots of O. rufipogon, eight populations were collected from different areas in Hainan, and investigated with hydroponic experiments. Iron plaque was induced by exposing the roots to a Kimura B nutrient solution supplemented with 0.532 mmol/L FeSO₄ for 24 h. All the four iron plaque indices showed that iron plaque formation on the roots was significantly different among the O. rufipogon populations. The relative amount of iron plaque for HLY, XLB, and HQF populations was 480.58, 382.66, 364.05 mg Fe/(cm·plant), respectively, which was much higher than those for the others. The amount of iron plaque per plant was positively related to most parameters of the roots, such as root biomass, surface area of adventitious roots, surface area of lateral roots, surface area and volume of root system. The relative amount of iron plaque on the roots had positive correlation with surface area of the lateral roots and its proportion, as well as root biomass and volume of root system. The content of iron plaque on the roots was only positively related to the proportion of surface area of the lateral roots. However, the amount of iron plaque per root surface area was not significantly correlated with the above parameters of the roots. All the four iron plaque indices had no correlation with root porosity. In summary, the major factors influencing iron plaque formation on the roots were surface area of lateral roots and its proportion, which could be used as the pivotal root parameters for confirming the populations of O. rufipogon with more iron plaque on roots.

Key words: Oryza rufipogon, iron plaque, root characteristics

CLC Number:

S31
S511.9

TANG Lu,WANG Sheng,DAN Jianguo. Iron Plaque Formation on Roots from Different Oryza rufipogon Populations[J]. Chinese Journal of Tropical Crops, 2020, 41(6): 1265-1272.

Figures/Tables 6

References 41

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居群名称 Code of populations	地点 Location	经纬度 Latitude and longitude	海拔 Altitude/m	原生境特征 In situ habitat characteristics
HLY	文昌市东路镇葫芦洋野生稻保护示范点	E:110°68° N:19°78°	25.30	生长于洼地、田边水沟渠旁,有水葫芦等杂草伴生。周围种有大面积的富贵竹。
HGV	文昌市东路镇红光村委会	E:110°70° N:19°73°	18.70	生长于浅水沼泽地,已建立保护区。周围种有木麻黄、重阳木以及一些海南灌木。
XLB	文昌市东路镇下路村	E:110°68° N:19°76°	26.90	生长于公路边小溪流里。周围种有对叶榕、椰子、菠萝蜜和重阳木等。
FLV	琼海市中原镇凤楼村	E:110°28° N:19°06°	12.00	生长于池塘和沼泽地,已建立保护区。周围种有杂交水稻。
MXV	万宁市东澳镇明星村	E:110°24° N:18°44°	10.00	生长于沼泽地和水沟,已建立保护区。周围为荒地或种有旱地作物。
HQF	儋州市和庆镇新征农场和庆分场四队	E:109°63° N:19°51°	133.90	生长于浅水沼泽地,已建立保护区。周围种有大量橡胶树和香蕉。
YYY	海口市琼山区红旗镇云雁村云雁洋	E:110°55° N:19°82°	34.40	生长于田边水沟旁,有水葫芦等杂草伴生。周围有芦苇、灌木及旱地作物。
MBV	海口市琼山区旧州镇美帮村	E:110°42° N:19°81°	21.50	生长于田边水沟旁。周围为荒地或种有旱地作物,如木薯、花生、玉米等。

居群名称 Code of populations	地点 Location	经纬度 Latitude and longitude	海拔 Altitude/m	原生境特征 In situ habitat characteristics
HLY	文昌市东路镇葫芦洋野生稻保护示范点	E:110°68° N:19°78°	25.30	生长于洼地、田边水沟渠旁,有水葫芦等杂草伴生。周围种有大面积的富贵竹。
HGV	文昌市东路镇红光村委会	E:110°70° N:19°73°	18.70	生长于浅水沼泽地,已建立保护区。周围种有木麻黄、重阳木以及一些海南灌木。
XLB	文昌市东路镇下路村	E:110°68° N:19°76°	26.90	生长于公路边小溪流里。周围种有对叶榕、椰子、菠萝蜜和重阳木等。
FLV	琼海市中原镇凤楼村	E:110°28° N:19°06°	12.00	生长于池塘和沼泽地,已建立保护区。周围种有杂交水稻。
MXV	万宁市东澳镇明星村	E:110°24° N:18°44°	10.00	生长于沼泽地和水沟,已建立保护区。周围为荒地或种有旱地作物。
HQF	儋州市和庆镇新征农场和庆分场四队	E:109°63° N:19°51°	133.90	生长于浅水沼泽地,已建立保护区。周围种有大量橡胶树和香蕉。
YYY	海口市琼山区红旗镇云雁村云雁洋	E:110°55° N:19°82°	34.40	生长于田边水沟旁,有水葫芦等杂草伴生。周围有芦苇、灌木及旱地作物。
MBV	海口市琼山区旧州镇美帮村	E:110°42° N:19°81°	21.50	生长于田边水沟旁。周围为荒地或种有旱地作物,如木薯、花生、玉米等。

居群 Populations	株高 Plant height/cm	分蘖数 Number of tillers per plant	生物量 Biomass		根孔隙度 Root porosity/%
居群 Populations	株高 Plant height/cm	分蘖数 Number of tillers per plant	地上部 Aboveground biomass/g	根系 Root biomass/mg	根孔隙度 Root porosity/%
HLY	108.83±2.46^bc	4.67±0.33^ab	2.06±0.42^a	271.67±62.04^abc	39.14±2.43^a
HGV	117.50±1.04^ab	3.67±0.33^ab	1.27±0.26^a	169.67±32.92^bc	34.18±0.91^a
XLB	118.50±2.75^a	4.67±1.20^ab	1.94±0.84^a	404.33±163.26^ab	35.51±3.30^a
FLV	111.00±2.84^abc	5.00±0.00^a	2.45±0.27^a	466.33±64.25^a	38.18±0.45^a
MXV	115.50±2.75^ab	3.33±0.33^ab	1.97±0.42^a	308.67±71.88^abc	36.46±3.35^a
HQF	105.50±3.01^c	4.00±0.58^ab	1.62±0.18^a	205.00±35.13^bc	33.28±3.36^a
YYY	117.67±3.48^ab	3.00±0.00^b	1.41±0.07^a	166.67±10.48^bc	38.40±0.85^a
MBV	112.67±3.00^abc	3.33±0.33^ab	1.29±0.12^a	121.33±6.23^c	35.35±3.58^a

居群 Populations	株高 Plant height/cm	分蘖数 Number of tillers per plant	生物量 Biomass		根孔隙度 Root porosity/%
居群 Populations	株高 Plant height/cm	分蘖数 Number of tillers per plant	地上部 Aboveground biomass/g	根系 Root biomass/mg	根孔隙度 Root porosity/%
HLY	108.83±2.46^bc	4.67±0.33^ab	2.06±0.42^a	271.67±62.04^abc	39.14±2.43^a
HGV	117.50±1.04^ab	3.67±0.33^ab	1.27±0.26^a	169.67±32.92^bc	34.18±0.91^a
XLB	118.50±2.75^a	4.67±1.20^ab	1.94±0.84^a	404.33±163.26^ab	35.51±3.30^a
FLV	111.00±2.84^abc	5.00±0.00^a	2.45±0.27^a	466.33±64.25^a	38.18±0.45^a
MXV	115.50±2.75^ab	3.33±0.33^ab	1.97±0.42^a	308.67±71.88^abc	36.46±3.35^a
HQF	105.50±3.01^c	4.00±0.58^ab	1.62±0.18^a	205.00±35.13^bc	33.28±3.36^a
YYY	117.67±3.48^ab	3.00±0.00^b	1.41±0.07^a	166.67±10.48^bc	38.40±0.85^a
MBV	112.67±3.00^abc	3.33±0.33^ab	1.29±0.12^a	121.33±6.23^c	35.35±3.58^a

居群 Populations	主根表面积 Surface area of adventitious roots per plant/cm²	侧根表面积 Surface area of lateral roots per plant/cm²	根系表面积 Root system's surface area per plant/cm²	侧根表面积所占比率 Percentage of surface area of lateral roots/%	根系体积 Root system volume per plant/cm³
HLY	198.70±40.40^c	92.16±22.04^a	290.86±62.04^bc	31.79±1.78^a	6.04±1.36^bc
HGV	142.53±14.48^c	15.60±8.19^b	158.13±22.66^c	8.89±3.41^c	3.48±0.37^c
XLB	373.53±120.60^ab	58.43±25.40^ab	431.96±145.61^ab	12.78±1.77^bc	11.99±4.20^ab
FLV	457.12±67.01^a	80.95±14.30^a	538.07±81.30^a	14.90±0.49^bc	15.11±2.75^a
MXV	279.41±52.18^bc	59.90±10.56^ab	339.31±62.61^abc	17.71±0.41^b	9.26±1.43^abc
HQF	153.47±26.57^c	57.61±17.39^ab	211.08±43.96^bc	26.31±2.40^a	3.80±0.70^c
YYY	126.77±11.60^c	26.53±3.79^b	153.30±14.98^c	17.21±1.15^b	3.38±0.38^c
MBV	120.99±10.52^c	16.72±2.68^b	137.70±11.05^c	12.20±1.75^bc	3.04±0.38^c